Jothiram Vivekanandan

Senior Scientist

Information

Bio

The main body of Vivek’s research is centered on his pioneering effort to characterize the microphysics of clouds and precipitation using advanced remote sensors. He is among a handful of researchers in the international community who mastered the theory, modeling, and observational aspects of atmospheric remote sensing. Moreover, Vivek has made important contributions in applied research and technology transfer to the user community. His general method has involved the interpretation of polarization and multi-wavelength radar and multi-spectral radiometer observations using insight gained from a numerical simulation of instrumentation responses to various types of cloud and precipitation fields.

The breadth of his publication record in a wide range of journals, his patents, and his joint publications with world-renowned atmospheric scientists and electromagnetic scattering and propagation experts attest to his high stature as a researcher in both scientific and technological areas. He is the co-chair of the AMS 2013 36^th Conference on Radar Meteorology. Vivek is the Chief Executive Editor of the Geoscientific Instrumentation, Methods and Data Systems (GI) Journal.

He co-chaired the Specialist Meeting on Microwave Remote Sensing, co-edited a two part Radio Science Special Section Remote Sensing of the Earth's Environment by Microwave Radiometers and Radar.Prime examples of his leadership are his recent development of a dual-wavelength radar system, created by adding a millimeter wave radar to the NCAR’s S-band polarization radar (S-Pol), and the ongoing development of a NSF funded cloud radar for HIAPER and airborne phase array radar for C-130 aircraft that will replace NSF’s airborne Doppler radar. The addition of a phased array radar to the NSF/NCAR C-130 platform will produce transformational change in its mission.

Publications

Publications

Section 1: Thesis and Dissertation

1. Vivekanandan, J., 1981: Studies on Mm-wave waveguide slotted arrays and S- band micro-strip arrays for frequency scanning applications. M. Tech Thesis, Indian Institute of Technology, Kharagpur, India.

2. Vivekanandan, J., 1986: Multi-parameter Radar Measurements in Colorado Convective Storms. Ph.D., Dissertation, Colorado State University, Fort Collins.

Section 2: Refereed Journal Publications

1. Bringi, V.N., R.M. Rasmussen and J. Vivekanandan, 1986: Multiparameter radar measurements in Colorado convective storms, Part I: Melting model studies. J. Atmos. Sci., 43, 2545-2563.

2. Bringi, V.N., J. Vivekanandan and J.D. Tuttle, 1986: Multiparameter radar measurements in Colorado convective storms, Part II: Hail detection studies. J. Atmos. Sci., 43, 2564-2577.

3. Bringi, V.N., V. Chandrasekar and J. Vivekanandan, 1987: X-band attenuation studies in convective rainshafts using multiparameter radar. J. Wave Matl. Interactions, 1, 117-139.

4. Bringi, V.N., J. Vivekanandan and V. Chandrasekar, 1987: Microwave backscatter and propagation effects in convective storms using dual-polarization/dual-frequency radar observations, Multiple Scattering of Waves in Random Media and Random Rough Surfaces. Technomic Publishing Co., PA.

5. Evans, F. and J. Vivekanandan, 1990: Multiparameter radar and microwave radiative transfer modeling of non-spherical atmospheric ice particles. IEEE Trans. on Geoscience and Remote Sensing, 28, 423-437.

6. Vivekanandan, J., V.N. Bringi and R. Raghaven, 1990: Multiparameter radar modeling and observations of melting ice. J. Atmos. Sci., 47, 549-564.

7. Vivekanandan, J., J. Turk, G.L. Stephens and V.N. Bringi, 1990: Microwave radiative transfer studies using combined multiparameter radar and radiometer measurements during COHMEX. J. Appl. Met., 29, 561-585.

8. Vivekanandan, J. Turk, and V. N. Bringi, 1991: Ice water path estimation and characterization using passive microwave radiometry. . J. Appl. Meteor., 30 (10), 1407-1421.

9. Vivekanandan, J., W.M. Adams and V.N. Bringi, 1991: Rigorous approach to polarimetric radar modeling of hydrometeor orientation distributions. J. Appl. Meteor., 30, 1053-1063.

10. Marzano, F.S., A. Mugnai, E.A. Smith, X. Xiang, J. Turk and J. Vivekanandan, 1993: Active and passive remote sensing of precipitating storms during CaPE. Part II: Intercomparison of precipitation retrievals over land from AMPR radiometer and CP-2 radar. Meteorology and Atmospheric Physics, E.A. Smith Ed. Space-based microwave remote sensing of hydrological variables, 54, No. 1-4, 29-51.

11. Vivekanandan, J., R. Raghaven and V.N. Bringi, 1993: Polarimetric radar modeling of mixtures of precipitation particles. IEEE Trans.on Geoscience and Remote Sensing, 31, No. 5, 1017-1030.

12. Vivekanandan, J., J. Turk and V.N. Bringi, 1993: Comparisons of precipitation measurements by the Advanced Microwave Precipitation Radiometer and multiparameter radar. IEEE Trans. on Geoscience and Remote Sensing, 31, No. 4, 860-870.

13. Monakov, A.A., J. Vivekanandan, A. Stjernman and A. Nystrom, 1994: Spatial and frequency averaging techniques for polarimetric scatterometer system. IEEE Trans. on Geoscience and Remote Sensing, 32, No. 1, 187-196.

14. Turk, J., J. Vivekanandan, F.F. Marzano, R.E. Hood, R.W. Spencer and F.J. LaFontaine, 1994: Active and passive microwave remote sensing of precipitation storms during CaPE. Part I: Advanced microwave precipitation radiometer and polarimetric radar measurements and models. Meteorology and Atmospheric Physics, 54, 3-27.

15. Vivekanandan, J., V.N. Bringi, M. Hagen and P. Meischner, 1994: Polarimetric radar studies of atmospheric ice particles. IEEE Transactions on Geoscience and Remote Sensing, 32, No. 1, 1--10.

16. Wilson, J.W., T.M. Weckwerth, J. Vivekanandan, R.M. Wakimoto and R.W. Russell, 1994: Boundary-layer clear-air echoes: Origin of echoes and accuracy of derived winds. J. Atmos. Oceanic Technol., 11, 1184-1206.

17. Brandes, E.A., J. Vivekanandan, J.D. Tuttle and C.J. Kessinger, 1995: A study of microphysics with multiparameter radar and aircraft observations. Mon. Wea. Rev., 123, No. 11, 3129-3143.

18. Stjernman, A., J. Vivekanandan and A. Nystrom, 1995: Dual-channel and multi-frequency radar system calibration. IEEE Trans. On Geoscience and Remote Sensing. 33 (2), 325-330.

19. Li, L., J. Vivekananandan, C.H. Chan and L. Tsang, 1997: Microwave radiometer technique to retrieve vapor, liquid and ice, Part I: Development of a neural network-based inversion method. IEEE Trans. on Geoscience and Remote Sensing, 35, 224-236.

20. Vivekananandan, J., L. Li, L. Tsang and C. Chan, 1997: Microwave radiometer retrieval of vapor, liquid and ice using a three-channel radiometer, Part II: Joint studies of radiometer and radar in winter clouds. IEEE Trans. on Geoscience and Remote Sensing, 35, 237-247.

21. Turk, J., J. Vivekanandan, T. Lee, P. Durkee and K. Nielsen, 1998: Derivation and applications of near-infrared cloud refletances from GOES-8 and GOES-/9. J. Appl. Meteorol. 37 (8), 819-831.

22. Brandes, E.A., J. Vivekanandan and J.W. Wilson, 1999: A comparison of radar reflectivity estimates of rainfall from collocated radars. J. Atmos. Ocenic Technol., 16, 1264-1272.

23. Rasmussen, R.M., J. Vivekanandan, J. Cole, B. Myers and C. Masters, 1999: The estimation of snowfall rate using visibility. J. Appl. Meteor., 38(10), 1542-1563.

24. Solheim, F.S., J. Vivekanandan, R.H. Ware and C. Rocken, 1999: Propagation delays induced in GPS Signals by dry air, water vapor, hydrometeors, and other particulates. J. Geophysical Research, V104, No. D8, 9663-9670.

25. Vivekananandan, J., D.S. Zrnic, S.M. Ellis, R. Oye, A.V. Ryzhkov and J. Straka, 1999: Cloud microphysics retrieval using S-band dual-polarization radar measurements. Bull. Amer. Meteor. Soc. 80(3), 381-388.

26. Vivekanandan, J., B. Martner, M.K. Politovich and G. Zhang, 1999: Retrieval of atmospheric liquid and ice characteristics using dual-wavelength radar observations. IEEE Trans. On Geoscience and Remote Sensing, 37, 2325-2334.

27. Vivekanandan, J., D.N. Yates and E.A. Brandes, 1999: The influence of terrain on rainfall estimates from radar reflectivity and specific propagation phase observations. J. Atmos. And Oceanic Tech., 16, 837-845.

28. Chong, M., J.-F. Georgis, O. Bousquet, S.R. Brodzik, C. Burghardt, S. Cosma, U. Germann, V. Gouget, R.A. Houze, Jr., C.N. James, S. Prieur, R. Rottunno, F.

Roux, J, Vivekanandan and S.-X Zeng, 2000: Real-time wind synthesis from Doppler radar observations during the Mesoscale Alpine Programme. Bull. Amer. Meteor. Soc., 81(12), 2953-2962.

29. Barthazy, E; Goeke, S; Vivekanandan, J; Ellis, SM., 2001: Detection of snow and ice crystals using polarization radar measurements: comparison between ground-based in situ and S-Pol observations. Atmos. Res., 59-60, 137-162.

30. Vivekanandan, J., G. Zhang and M.K. Politovich, 2001: An assessment of droplet size and liquid water content derived from dual-wavelength radar measurements to the application of aircraft icing detection. J. Atmos. and Oceanic Tech., 18(11), 1787-1798,

31. Zhang, G., J. Vivekanandan and E. Brandes, 2001: A method for estimating rain rate and drop size distribution from polarimetric radar measurements. IEEE Transactions on Geoscience and Remote Sensing. 39(4), 830-841.

32. Zrnic, D., A. Ryzhkov, J. Straka, Y. Liu, and J. Vivekanandan, 2001: Testing a procedure for automatic classification of hydrometeor types. J. Tech., 18(6), 892-913.

Zhang, G.,Vivekanandan, J. and Brandes, E., 2002: Effects of random inhomogeneity on radar measurements and rain rate estimation. IEEE Transactions on Geoscience and Remote Sensing. 40(1), 223-227.

33. Brandes, E., G. Zhang and J. Vivekanandan, 2002: Experiments in rainfall estimation with a polarimetric radar in a subtropical environment. J. Atmos. Meteorol., 41 (6), 674-685.

Guifu Zhang; Doviak, R.J.; Vivekanandan, J., Range interferometry technique to determine radial wind. Geoscience and Remote Sensing Symposium, 2002. IGARSS '02. 2002 IEEE International

34. Knight, Charles A. and J. Vivekanandan, 2002: First radar echoes and the early ZDR history of Florida Cumulus. J. Atmos. Sci., 59(9), 1454-1472.

35. Ryzhkov, A.V., D.S. Zrnic, J.C. Hubbert, J.C., V.N. Bringi, J. Vivekanandan and E.A. Brandes, 2002: Polarimetric radar observations and interpretation of co-cross-polar correlation coefficients. J. Atmos. and Oceanic Tech., 19(3), 340-354.

36. Zhang, G., J. Vivekanandan and E. Brandes, 2002: Effects of random inhomogeneity on radar measurements and rain rate estimation. IEEE Trans. On Geoscience and Remote Sensing, 40(1), 223-227.

37. Zhang, G., J. Vivekanandan and E.A. Brandes, 2002: The shape-slope relation in Gamma raindrop size distribution: statistical error or useful information? Accepted: J. Atmos. Ocean. Tech.

38. Zhang, G., R. Doviak and J. Vivekanandan, 2003: Cross-correlation ratio method to estimate cross beam wind and comparison with the full correlation analysis. Radio Science, 38(3).

39. Brandes, E. A., G. Zhang, and J. Vivekanandan , 2003: An evaluation of drop distribution-based polarimetric radar rainfall estimator. J. Appl.. Meteor. 42,652-660.

40. Vivekanandan, J., G. Zhang, and S.M. Ellis, S. Avery ad D. Rajopadyahya, 2003: Radar reflectivity calibration using differential propagation phase measurement. Radio Science, 38(3).

41. Westwater, E.R. and J. Vivekanandan, 2003: Preface to special section: Remote Sensing of the Earth's Environment by Microwave Radiometers and Radar. Radio Science, 38(3).

42. Zhang G.F., R.J. Doviak RJ and J. Vivekanandan, 2003: Cross-correlation ratio method to estimate cross-beam wind and comparison with a full correlation analysis. Radio Science, 38(3), Art. No. 8052.

43. Rasmussen, R., Dixon, M., Vasiloff, S., Hage, F., Knight, S., Vivekanandan, J. and.Xu, M. 2003, "Snow Nowcasting Using a Real-Time Correlation of Radar Reflectivity with Snow Gauge Accumulation", Journal of Applied Meteorology, 42(1), 20-36.

44. Zhang, G., Vivekanandan, J., Brandes, E., Meneghini, R. and Kozu, T. 2003, "The Shape-Slope Relation in Observed Gamma Raindrop Size Distributions: Statistical Error or Useful Information?", Journal of Atmospheric and Oceanic Technology, 20(8), 1106-1119.

45. Zhang, G., R.J. Doviak and J. Vivekanandan, 2003: Angular and range interferometry to measure wind. Radio Science, 38(6). Art. No. 1106.

46. Ryzhkov, A., Zrnic, D., Hubbert, J., Bringi, V., Vivekanandan, J. and Brandes, E. 2002, "Polarimetric Radar Observations and Interpretation of Co-Cross-Polar Correlation Coefficients", Journal of Atmospheric and Oceanic Technology, 19(3), 340-354.

47. Brandes, E., G. Zhang, and J. Vivekanandan, 2004: Comparison of polarimetric radar drop size distribution retrieval algorithm, J. Atmos. Ocean. Tech.,21, 584-

598.

48. Zhang, G., Doviak, R.J., Vivekanandan, J., Brown, W.O. and Cohn, S.A. 2004, "Performance of correlation estimators for spaced-antenna wind measurement in the presence of noise." Radio Science, 39(3).

49. Brandes E.A., G.F. Zhang and J. Vivekanandan, 2004: Comparison of polarimetric radar drop size distribution retrieval algorithms. J. Atmos. and Oceanic Tech., 21 (4), 584-598.

50. Brandes E.A., G.F. Zhang and J. Vivekanandan, 2004: Drop size distribution retrieval with polarimetric radar: Model and application. J. Appl. Meteor., 43(3), 461-475.

51. Vivekanandan J., G.F. Zhang and E.A. Brandes, 2004: Polarimetric radar estimators based on a constrained gamma drop size distribution model. J. Appl. Meteor., 43(2), 217-230.

52. Deeter M.N. and J. Vivekanandan, 2005: AMSU-B observations of mixed-phase clouds over land. J. Appl. Meteor., 44(1), 72-85.

53. Brandes E.A., G.F. Zhang, and J. Vivekanandan, 2005: Experiments in rainfall estimation with a polarimetric radar in a subtropical environment. J. Appl. Meteor., 41, 186-186.

54. Deeter, M. N. and J. Vivekanandan, 2006: New dual-frequency microwave technique for retrieving liquid water path over land. J. Geophysical Research., 111, D15209, doi: 10.1029/2005JD006784.

55. Anagnostou, M., Anagnostou, E., Vivekanandan, J. and Ogden, F. 2007, "Comparison of Raindrop Size Distribution Estimates From X-Band and S-Band Polarimetric Observations", IEEE Geoscience and Remote Sensing Letters, 4 (4), 601-605.

56. Anagnostou,M.N.; Anagnostou,E.N.; Vivekanandan, J., 2006, Correction for Rain Path Specific and Differential Attenuation of X-Band Dual-Polarization Observations. Geoscience and Remote Sensing, IEEE Transactions, 44(9), 2470-2480

57. Vivekanandan, V.; Wong, V.W.S., 2007, Concentric Anchor Beacon Localization Algorithm for wireless Sensor Networks. Vehicular Technology, IEEE Transactions on Volume: 56 , Issue: 5 , Part: 1

58. Williams, J. and Vivekanandan, J. 2007, "Sources of Error in Dual-Wavelength Radar Remote Sensing of Cloud Liquid Water Content", Journal of Atmospheric and Oceanic Technology, 24(8), 1317-1336.

59. Anagnostou, M., Anagnostou, E., Vivekanandan, J. and Ogden, F. 2008, "Comparison of Two Raindrop Size Distribution Retrieval Algorithms for X-Band Dual Polarization Observations", Journal of Hydrometeorology, 9(3), 589-600.

60. Anagnostou, M., Anagnostou, E., Vulpiani, G., Montopoli, M., Marzano, F. and Vivekanandan, J. 2008, "Evaluation of X-Band Polarimetric-Radar Estimates of Drop-Size Distributions From Coincident S-Band Polarimetric Estimates and Measured Raindrop Spectra", IEEE Transactions on Geoscience and Remote Sensing, 46(10) Part 2, 3067-3075.

61. Knupp, K., Coleman, T., Phillips, D., Ware, R., Ware, R., Vandenberghe, F., Vivekanandan, J., Cimini, D. and Westwater, E. 2009, "Ground-Based Passive Microwave Profiling during Dynamic Weather Conditions", Journal of Atmospheric and Oceanic Technology, 26(6), 1057-1073.

62. Padmanabhan, S., Reising, S., Vivekanandan, J. and Iturbide-Sanchez, F. 2009, "Retrieval of Atmospheric Water Vapor Density With Fine Spatial Resolution Using Three-Dimensional Tomographic Inversion of Microwave Brightness Temperatures Measured by a Network of Scanning Compact Radiometers", IEEE Transactions on Geoscience and Remote Sensing, 47 (11),3708-3721.

63. Ellis, S. M., and J. Vivekanandan, 2010: Water vapor estimates using simultaneous dual-wavelength radar observations. Radio Science, 45, RS5002, doi:10.1029/2009RS004280.

64. Ellis, S. M., and J. Vivekanandan, 2011: Liquid water content estimates using simultaneous S and Ka-band radar measurements. Radio Science, doi:10.1029/2010RS004361.

65. Swaroop Sahoo, Steven C. Reising, Sharmila Padmanabhan, J. Vivekanandan, Flavio Iturbide-Sanchez, Nazzareno Pierdicca,Emanuela Pichelli, and Domenico Cimini, 2011: 3-D Humidity Retrieval using a Network of Compact Microwave Radiometers to Correct for Variations in Wet Tropospheric Path Delay in Spaceborne Interferometric SAR Imagery. IEEE Transactions on Geoscience and Remote Sensing, 49 (9),3281-3290.

Section 3: Refereed Book Review

Vivekanandan, J. Book Review: Weather Radar: Principles and Advanced Applications ,Peter Meischner (Editor) , Springer-Verlag, Berlin; 337 pp.; ISBN 3-540-00328-2; 2004, EOS, AGU.

Section 4: Publications Submitted

1. Chang, W., Jothiram Vivekanandan, and Tai-Chi Chen Wang, 2012: Estimation of X-band Polarimetric Radar Measurement Error Covariance and Attenuation Using a Variational Method. Submitted to Journal of Atmospheric and Oceanic Technology.

Section 5: Non-refereed Publications

1. Vivekanandan, J., and V.M. Pandharipande, 1981: Analysis and design of Mm wave edge slot array with optimum efficiency. Preprints, Int'l Conf. on Communication Circuits and Systems, India.

2. Bringi, V.N., J. Vivekanandan, V.K. Varadan and V.V. Varadan, 1983: Average dielectric properties of discrete random media using multiple scattering theory. National Radio Science/IEEE Meeting, Houston.

3. Bringi, V.N., J. Vivekanandan and J.D. Tuttle, 1984: Joint analysis of dual-wavelength and differential reflectivity radar measurements. Preprints, 22nd Int'l Conf. on Radar Meteor., Zurich, 10-13 September. Amer. Meteor. Soc., Boston.

4. Chandrasekar, V.N. Bringi and J. Vivekanandan, 1984: Analysis of raindrop parameter using 2D-PMS probes during the May Polarization Experiment (MAYPOLE). Preprints, 22nd Conf. on Radar Meteor. Zurich, 10-13 September. Amer. Meteor. Soc., Boston.

5. Vivekanandan, J., V.N. Bringi and R.M. Rasmussen, 1984: Multiparameter radar and aircraft measurements of convective cells during the May Polarization Experiment (MAYPOLE). Preprints, 22^nd Int'l Conf on Radar Meteor., Zurich, 10-13 September. Amer. Meteor. Soc., Boston.

6. Bringi, V.N., J. Vivekanandan and R.M. Rasmussen, 1985: Radar and microphysical studies of the convective melting transition: Implications for attenuation modeling. 1985 North American Radio Science Meeting, Canada.

7. Vivekanandan, J., V.N. Bringi and V. Chandrasekar, 1985: Computation of backscatter and propagation effects in severe convective storms: Comparisons with dual-polarized radar observations at S- and X-bands. 1985 North American Radio Science Meeting, Canada.

8. Vivekanandan, J., V.N. Bringi and R.E. Carbone, 1986: Raindrop size distributions in Colorado convective rainshafts. Preprints, 23rd Int'l Conf. on Radar Meteor., Snowmass, Colo., 22-26 September. Amer. Meteor. Soc., Boston.

9. Vivekanandan, J., V.N. Bringi, R.M. Rasmussen and J. Lew, 1986: Graupel/Hail melting studies in Colorado convective storms. Preprints,Joint session 23rd Conf. on Radar Meteor. and Cloud Physics, Snowmass, Colo., 22-26 September. Amer. Meteor. Soc., Boston.

10. Bringi, V.N., J. Vivekanandan and S. Menon, 1989: Multiparameter radar analysis of microburst during MIST. Preprints, 24th Conf. on Radar Meteor., Tallahassee, 27-31 March. Amer. Meteor. Soc., Boston.

11 Vivekanandan, J. and Evans, F., 1989: Millimeter Wave Radiative Transfer Studies For Precipitation Measurements. Geoscience and Remote Sensing Symposium, 1989. IGARSS'89. 12th Canadian Symposium on Remote Sensing, 1910-1913.

12. Vivekanandan, J.; Adams, W.M.; Bringi, V.N., 1989: Generalized Backscatter And Propagation Modelling Of Precipitation For Polarimetric Radar Applications. Geoscience and Remote Sensing Symposium, 1989. IGARSS'89. 12th Canadian Symposium on Remote Sensing. 1902-1904.

13. Meischner, P., T. Jank, V.N. Bringi and J. Vivekanandan, 1989: Multiple-plane ZDR measurements in convective and stratiform clouds using the C-band polarimetric DFVLR radar. Preprints, 24th Int'l Conf. on Radar Meteor., Tallahassee, 27-31 March. Amer. Meteor. Soc., Boston.

14. Vivekanandan, J., G.L. Stephens and J. Turk, 1989: Joint analysis of multiparameter radar and radiometer measurements of convective storms. Preprints, 24th Int'l Conf. on Radar Meteorology, Tallahassee, 27-31 March. Amer. Meteor. Soc., Boston.

15. Vivekanandan, J., F. Evans and J. Turk, 1989: Millimeter wave radiative transfer studies for precipitation measurements, IGARSS '89/12th Canadian Symposium, Canada.

16. Vivekanandan, J., W.M. Adams and V.N. Bringi, 1989: Generalized backscatter and propagation modeling of precipitation for polarimetric radar applications. '89/12th Canadian Symposium, Canada, IGARSS.

17. Bringi, V.N., D.A. Burrows and J. Vivekanandan, 1991: Multiparameter radar and aircraft study of raindrop spectral evolution in warm-based clouds. Preprints, 25th Conf. on Radar Meteor., Paris, 24-28 June. Amer. Meteor. Soc., Boston.

18. Turk, J., J. Vivekanandan and V.N. Bringi, 1991: Bulk ice characterization using coupled cloud, multiparameter radar and radiative transfer models.Preprints, 25th Int'l Conf. on Radar Meteorology, Paris, 24-28 June. Amer. Meteor. Soc., Boston.

19. Vivekanandan, J., 1991: Polarimetric radar imaging of distributed ice shatterers. Proc., Progress in Electromagnetics Research Symposium, Cambridge, Mass.,1-5 July. p. 491.

20. Vivekanandan, J. and V.N. Bringi, 1991: Rigorous approach to polarimetric radar modeling of hydrometeor orientation distributions. Preprints, 25th Int'l Conf. on Radar Meteorology, Paris, 24-28 June. Amer. Meteor. Soc., Boston.

21. Vivekanandan, J., J. Turk and V.N. Bringi: 1991: Remote sensing of precipitation structures using combined microwave radar and radiometer techniques. Wave propagation and scattering in random media II, San Diego.

22. Stjernman, A., J. Vivekanandan and A. Nystrom, 1992: Polarimetric scatterometer system for vegetation and soil remote sensing. Proc., Microwave Signature - 92, Innsbruck, 1-3 July. Deutsche Forschungsanstalt fur Luft - und Raumfahrt, Oberpfaffenhofen, 2C-39 -- 2C-44.

23. Turk, J., J. Vivekanandan and V.N. Bringi, 1992: Studies of microwave radiative transfer model results with multiparameter radar. mu '92 Specialist Meeting on Microwave Radiometry and Remote Sensing Applications, Boulder, Co., June. Wave Propagation Laboratory, National Oceanic and Atmospheric Administration.

24. Vivekanandan, J., R. Raghavan and V.N. Bringi, 1992: Polarimetric radar modeling of mixtures of precipitation particles. Int'l Geoscience and Remote Sensing Symposium, Vol. II, Houston, 26-29 May. IGARSS, 1379-1382.

25. Vivekanandan, J., J. Turk, R.E. Hood, V.L. Griffin, F.J. LaFontaine, V.N. Bringi and R.W. Spencer, 1992: Multiparameter and advanced microwave precipitation radiometer observations of tropical convection. Int'l Geoscience and Remote Sensing Symposium, Houston, 26-29 May. 1719-1721.

26. Anders, S., N. Anders and J. Vivekanandan, 1993: Calibration of a dual-channel radar anenna system using point targets to estimate gain and cross-talk parameters. Proc., Progress in Electromagnetic Research Symposium, Pasadena, 12-16 July. p. 552.

27. Turk, J., J. Vivekanandan, F.S. Marzano and V.N. Bringi, 1993: Applications of the advanced microwave precipitation radiometer for precipitation retrieval using multiparameter radar verification. Preprints, 26th Int'l Conf. on Radar Meteor., Norman, OK., 24-28 May. Amer. Meteor. Soc., Boston, 710-712.

28. Vivekanandan, J, 1993: Ice water content estimate using multiparameter radar observations. Proc., Progress in Electromagnetic Research Symposium, Pasadena,12-16 July. p. 777.

29. Monakov, A.A.; Vivekanandan, J.; Nystrom, A.; Stjernman, A, 1993: Antenna illumination effects on measurements of rough surface scattering. Geoscience and Remote Sensing Symposium, IGARSS '93, 231-233

30. Adams, W.M.; Vivekanandan, J., 1993: Snowfall rate and supercooled liquid water content retrieval using the dual-frequency radar technique. Geoscience and Remote Sensing Symposium, IGARSS '93, 1922-1924

31. Vivekanandan, J.; Turk, J.; Marzano, F.S.; Mugnai, A.; Spencer, R.W.; Hood, R.E.; LaFontaine, F.J.; Smith, E.A.; Bringi, V.N., 1993: Active and passive remote sensing of precipitation over ocean surfaces. Geoscience and Remote Sensing Symposium, IGARSS '93, 1241-1243.

32. Raghavan, R. and Vivekanandan, J., 1993: Retrieval of storm microphysics using Ka band radar observations. Geoscience and Remote Sensing Symposium, IGARSS '93, 91-93.

33. Vivekanandan, J. and W.M. Adams, 1993: Snowfall rate and supercooled liquid water content retrieval using dual-frequency radar techniques. Presented. Int'l Geoscience and Remote Sensing Symposium, Tokyo, 17-22 August.

34. Vivekanandan, J. and R. Raghavan, 1993: Polarimetric radar modeling of precipitation at Ka-band. Preprints, 26th Conf. On Radar Meteor., Norman, OK, 24-28 May. Amer. Meteor. Soc., Boston, 132-134.

35. Vivekanandan, J., J. Turk, F. Marzano, A. Mugnai, R.W. Spencer, R.E. Hood, F.J. LaFontaine, E.A. Smith and V.N. Bringi, 1993: Coincident active and active-passive microwave remote sensing of precipitation using airborne multifrequency radiometer and dual-polarization radar. Presented. XXIVth General Assembly of the Int'l Union of Radio Science, Kyoto, Japan, 25 August-2 September.

36. Turk, J.; Vivekanandan, J. 1994: Effects of hydrometeor shape and orientation upon passive microwave brightness temperature measurements. Specialist meeting Microwave radiometry and remote sensing of the environment p. 187-196

37. Li, L., J. Vivekanandan, C.H. Chan, L. Tsang and J.N. Hwang, 1994: Studies in passive remote sensing of vapor, liquid and ice water paths. Preprints Volume II, International Geoscience and Remote Sensing Symposium, Pasadena, 8-12 August. IEEE, 666-668.

38. Nystrom, A. A. Stjernman and J. Vivekanandan, 1994: Temporal variations in radar backscatter coefficients of vegetation and soil media. Preprints Volume II, International Geoscience and Remote Sensing Symposium, Pasadena, 8-12 August. IEEE, 2483-2485.

39. Raghavan, R., J. Turk and J. Vivekanandan, 1994: Investigation of the vertical profiles of linear depolarization ratio and reflectivity at S, X and K band wavelengths. Preprints, International Geoscience and Remote Sensing Symposium.

40. Stjernman, A.A., J. Vivekanandan and A. Nystr\"om, 1994: Studies on polarization synthesis and differential backscatter phase observations. Scatter coefficients of vegetation and soil media. Preprints Volume II, International Geoscience and Remote Sensing Symposium, Pasadena, 8-12 August. IEEE, 1381-1383.

41. Thurai, M. and J. Vivekanandan, 1994: Estimation of ice water content using multi-parameter radar measurements. Preprints Volume II, International Geoscience and Remote Sensing Symposium, Pasadena, 8-12 August. IEEE, 32-34.

42. Vivekanandan, J. and J. Turk, 1994: K-band model computations of propagation effefcts in precipitation. Preprints Volume II, International Geoscience and Remote Sensing Symposium, Pasadena, 8-12 August. IEEE, 363-365.

43. Vivekanandan, J. and J. Turk, 1994: High resolution microwave radiometric signatures of mid-latitude and tropical rainfall. Preprints Volune I, International Geoscience and Remote Sensing Symposium, Pasadena, 8-12 August. IEEE, 433-435

44. Brandes, E.A., J. Vivekanandan, J.D. Tuttle and C.J. Kessinger, 1995: Hail production in a northeastern Colorado thunderstorm. Preprints, 27th Conf. on Radar Meteor., Vail, CO, 9-13 October. Amer. Meteor. Soc., Boston, 527-529.

45. Rasmussen, R.M. and J. Vivekanandan, 1995: Snowfall ratge measurement using radar and optical techniques. Presented. National Science Meeting, Boulder, Colorado.

46. Brandes, E.A., J. Vivekananadan and J.W. Wilson, 1997: Radar rainfall estimates of the Buffalo Creek Flash Flood using WSR-88D and polarimetric radar data. Preprints, 28th Conf. on Radar Meteorology, Austin, TX, 7-12 September. Amer. Meteor. Soc., Boston, 123-124.

47. Brandes, E.A., J. Vivekanandan, J.W. Wilson, V.N. Bringi, V. Chandrasekar, S.A. Rutledge and D.S. Zrnic, 1997: A program to improve radar estimates of rainfall. Preprints, 13th Conf. on Hydrology, Long Beach, CA, 2-7 February. Amer. Meteor. Soc., Boston, 304-307.

48. Lutz, J., B. Rilling, J. Wilson, T. Weckwerth and J. Vivekanandan, 1997: S-Pol after three operational deployments, technical performance, siting experiences, and some data examples. Preprints, 28th Conf. on Radar Meteorology, Austin, TX, 7-12 September. Amer. Meteor. Soc., Boston, 286-287.

49. Rasmussen, R., J. Vivekanandan and J. Cole, 1997: On the use of visibility to estimate snowfall rate. Preprints, First Symposium on Integrated Observing Systems, Long Beach, CA, 2-7 February. Amer. Meteor. Soc., Boston.

50. Thompson, G., T.F. Lee and J. Vivekanandan, 1997: Comparisons of satellite-based aircraft icing diagnoses. Preprints, Seventh Conf. on Aviation, Range and Aerospace Meteorology, Long Beach, CA, 2-7 February. Amer. Meteor. Soc., Boston, 132-137.

51. Vivekanandan, J., 1997: Aircraft icing detection using satellite and radar observations. Preprints, Seventh Conf. on Aviation, Range and Aerospace Meteorology, Long Beach, CA, 2-7 February. Amer. Meteor. Soc., Boston, 146-151.

52. Vivekanandan, J., G. Thompson and T.F. Lee, 1997: Aircraft icing detection using satellite data and weather forecast model results. Proc. of FAA International conference on aircraft inflight icing, Vol.II.

53. Vivekanandan, J., Brandes, E.A., and S. Ellis, 1998: Comparison between ZDR and specific propagation phase-based precipitation estimation, Fourth Inter. Symp. On Hydro. Appli. of Weather radar, April, San Diego.

54. Zhang, J., Vivekanandan and M.K. Politovich, 1998: Effect of scattering on microwave passive remote sensing of cloud liquid water content. Preprints, 8^th Conf. On Aviation, Range and Aerospace Meteorology, Dallas, 11-15 January. Amer. Meteor. Soc., Boston.

55. Ryzhkov, A., D. Zrnic, E. Brandes, J. Vivekanandan, V. Bringi and G. Huang, 1999: Characteristics of Hydrometer Orientation Obtained from Radar Polarimetric Measurements in a Linear Polarization Basis. Proc. International Geoscience and Remote Sensing Symposium. Hamburg, Germany, 28 June - 2 July.

56. Guifu, Zhang; Vivekanandan, J, 1999: Microwave radiation from mixed phase cloud and parameter retrievals. Geoscience and Remote Sensing Symposium, IGARSS ’99 Proceedings. IEEE 1999 International. Volume:4

57. Vivekanandan, J., B. Martner, M.K. Politovich and G. Zhang, 1999: APCAT: An AP clutter analysis tool. Preprints, 29^th Conf. On Radar Meteorology, Montreal, 12-16 July. Amer. Meteor. Soc., Boston, 267-269.

58. Vivekanandan, J., G. Zhang and M.K. Politovich, 1999: Estimate of droplet size and liquid water content using dual-frequency radar measurements for aircraft icing detection. Proc. 29^th ICRM, Montreal, 12-16 July. Amer. Meteor. Soc., Boston, 872-875.

59. Vivekanandan, J., G. Zhang and A.V. Ryzhkov, 1999: Estimation of canting angle distribution of raindrop spectra using radar measurement. International Radar Symposium, India, December.

60. Zhang, G. and J. Vivekanandan, 1999: Microwave radiation from mixed phase cloud for ground-based radiometer remote sensing. Proc. International Geoscience and Remote Sensing Symposium, Hamburg, Germany. June 28-July 2.

61. Zhang, G., J. Vivekanandan and M.K. Politovich, 1999: Scattering effects on microwave passive remote sensing of cloud parameters. Proc. 8^th Conf. On Aviation, Range and Aerospace Meteorology, Dallas, 10-15 January. Amer. Meteor. Soc., Boston, 497-501.

62. Barthazy, E, S. Goke, J. Vivekanandan and Z. Zeng, 2000: Comparison of the two hydrometeor identification algorithms of the S-Pol radar with in-situ measurements of hydrometeors on a mountain. Proc. 13th Int. Conf. On Clouds and Precip., Reno, NV, 14-18 August. International Commission on Clouds and Precipitation of the International Association of Meteorology and Atmospheric Sciences, 292-295.

63. Brandes, E., G. Zhang, J. Vivekanandan, and S. M. Ellis, 2000: An evaluation of polarimetric radar rainfall estimators in a semi-tropical environment. 2nd USWRP Symp., Boulder, Colorado, 27-29 March.

64. Brandes E. A., G. Zhang, J. Vivekanandan, and S. M. Ellis, 2000: A study of polarimetric radar rainfall estimators in semi-tropical environment. AGU 2000 Spring Meeting, May 30- June 3.

65. Ellis, S.M., J. Vivekanandan, E.A. Brandes, J. Stith and R.J. Keeler, 2000: Aircraft icing detection using s-band polarization radar measurements. Preprints, Ninth Conf. on Aviation, Range and Aerospace Meteorology, Orlando, Florida, 11-15 September. Amer. Meteor. Soc., Boston, 245-250.

66. Ellis, S., J. Vivekanandan, J. Keeler, and E. A. Brandes, 2000: Aircraft icing detection using S-band polarimetric radar observation. 9^th Conference on Aviation, Range, and Aerospace Meteorology, Orlando, Florida, 11-15 September. Amer. Meteor. Soc, Boston.

67. Goke, S., E. Barthazy, S. Ellis, J. Vivekanandan and Z. Zeng, 2000: In situ verification of polarimetric radar-based hydrometeor types. Proc. 13th Int. Conf. On Clouds and Precip. Reno, NV, 14-18 August. International Commission on Clouds and Precipitation of the International Association of Meteorology and Atmospheric Sciences, 272-275.

68. Houze, R. A., C. James, Z. Zeng, M. Steiner, U. Germann, J. Vivekanandan, and S. Brodzik, 2000: Heavy rain and flooding on the Mediterranean side of the Alps: MAP IOPs 2B, 3, and 5. Ninth Conf. On Mountain Meteorology, Aspen, Colorado. 7-11 August.

69. Keeler, R. J., J. Lutz and J. Vivekanandan, 2000: S-Pol: NCAR’S Polarimetric research radar. Preprints, International Geoscience and Remote Sensing Symposium, Honolulu. 24-28 July.

70. Zmic, D.S.; Ryzhkov, A.; Straka, J.; Yidi Liu; Vivekanandan, J.; 2000: Sensitivity of an automatic procedure for hydrometeor classification. Geoscience and Remote Sensing Symposium, 2000. Proceedings. IGARSS 2000. IEEE 2000 International

71. Ryzhkov, A., D. Zrnic, J. Hubert, V. Bringi, J. Vivekanandan and E. Brandes, 2000: Interpretation of polarimetric radar covariance matrix for meteorological scatterers. Preprints, International Geoscience and Remote Sensing Symposium, Honolulu. 24-28 July.

72. Vivekanandan, G. Zhang, and M. K. Politovich, 2000: Multi-frequency radar measurements of liquid water content and droplet size. Preprints, Ninth Conf. on Aviation, Range, and Aerospace Meteorology, Orlando, Florida, 11-15 September. Amer. Meteor. Soc., Boston, 557-562.

73. Vivekanandan, J., G. Zhang, E. A. Brandes and J. Miller: 2000: Raindrop size distribution retrieval using polarimetric radar measurements. USWRP Symposium, Boulder, Colorado, 27-29 March.

74. Vivekanandan, J., G. Zhang, and M.K. Politovich, 2000: Estimation of cloud droplet size and liquid water content using dual-wavelength. Preprints, International Geoscience and Remote Sensing Symposium, Honolulu. 24-28 July.

75. Zhang, G., J. Vivekanandan and E. Brandes, 2000: A method for estimating rain rate and drop size distribution from polarimetric radar measurements. Preprints, International Geoscience and Remote Sensing Symposium, Honolulu. 24-28 July.

76. Zrnic, D.S. , A. Ryzhkov, J. Straka, Y. Liu and J. Vivekanandan, 2000: Sensitivity of an automatic procedure for hydrometeor classification. Preprints, International Geoscience and Remote Sensing Symposium, Honolulu. 24-28 July.

77. Brandes, E.A., G. Zhang and J. Vivekanandan, 2001: Experiments in rainfall estimation with a polarimetric radar. 30^th International Conf. On Radar Meteorology, 19-24 July, Munich. Amer. Meteor. Soc., Boston.

78. Vivekanandan, J., G. Zhang and M.K. Politovich, 2001: Analysis of a dual-wavelength radar technique for estimating liquid water content and droplet size. 30^th International Conf. On Radar Meteorology, 19-24 July, Munich. Amer. Meteor. Soc., Boston.

79. Vivekanandan, J. and G. Zhang, 2001: Numerical study of multi-frequency dual-polarization microwave radiometry technique for supercooled liquid water detection. IEEE Geoscience and Remote Sensing Symposium 2001, 9-13 July, Sydney, Australia.

80. Vivekanandan, J., G. Zhang and M.K. Politovich, 2001: Estimation of cloud droplet size and liquid water content using dual-wavelength radar measurements. Submitted. IEEE Geoscience and Remote Sensing Symposium 2001, 9-13 July, Sydney, Australia.

81. Zhang, G., J. Vivekanandan and E. Brandes, 2001: Sampling effects on radar measurements and its consequence on parameter retrieval. IEEE Geoscience and Remote Sensing Symposium 2001, 9-13 July, Sydney, Australia.

82. Zhang, G., J. Vivekanandan and R.J. Doviak, 2001: Innovative cross-correlation method for determining three-dimensional wind. 30^th International Conf. On Radar Meteorology, 19-24 July, Munich. Amer. Meteor. Soc., Boston.

83. Brandes, E. A., G. Zhang, and J. Vivekanandan, 2002: Monitoring drop-size distributions and associated rain rates with polarimetric radar. Paper presented at the USWRP 4th Symposium, Boulder, CO.

84. Vivekanandan, J. and Zhang, G. 2002, Effects of Scattering Due to Ice Particles on Measurement of Down-Welling Radiation Observation of K and V-band Radiometers, American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 USA; Range, and Aerospace Meteorology.

85. Brandes, E. A., J. Vivekanandan, and R. Rasmussen, 2002: Rain-snow discrimination with polarimetric radar. Preprints, 10th Conf. On Aviation, Range, and Aerospace Meteor., Amer. Meteor. Soc., Portland, OR, 108-111.

86. Zhang, G., Doviak, R.J.; Vivekanandan, J, 2002: Range interferometry technique to determine radial wind. IEEE Geoscience and Remote Sensing Symposium 2002, 9-13 July, 2549-2552.

87. Brandes, E. A., G. Zhang, and J. Vivekanandan, 2002: Monitoring drop-size distributions with polarimetric radar. Proc., 11th Conf. On Cloud Physics, Amer. Meteor. Soc., Ogden, UT.

88. Brandes, E. A., G. Zhang, and J. Vivekanandan, 2002: Precipitation estimation with polarimetric radar: Results of field studies. Paper presented at the World Weather Research Programme (WWRP) International Conf. On Quantitative Precipitation Forecasting, Reading, United Kingdom.

89. Rangarajan, K.E., and J. Vivekanandan, 2002: Sensitivity of Ground-based Radiometric Observations to Atmospheric Temperature Inversions. Proceedings, 10th Conference on Aviation, Range, and Aerospace Meteorology, Vol. 10. Portland. Amer. Meteor. Soc., Boston.

90. Ryzhkov, A.V.; D.S. Zrnic, J.C. Hubbert, V.N. Bringi, J. Vivekanandan and E.A. Brandes, 2002: Polarimetric Radar Observations and Interpretation of Co-Cross-Polar Correlation Coefficients. J. Atmos. and Oceanic Tech., 19(3), 340-354.

91. Williams, J.K., J. Vivekanandan and G. Zhang, 2002: Evaluation of a remote icing detection technique using X-, Ka-, and W-band radar and microwave radiometer observations. Proceedings, 10^th Conf. on Aviation, Range, and Aerospace Meteorology, Vol. 10. Portland. Amer. Meteor. Soc., Boston.

92. Williams, J. K., J. Vivekanandan, and G. Zhang, 2002: Evaluation of remote icing detection techniques using X-, Ka-, and W-band radar and microwave radiometer observations. Preprints, Conference on Aviation, Range, and Aerospace Meteorology, 224-227.

92. Stoelinga, M.T., J.D. Locatelli, P.V. Hobbs and J. Vivekanandan, 2003: Doppler wind analysis of the airflow in a stratiform frontal rainband in the Pacific Northwest using a bistatic radar network. Proceedings, 31st AMS International Conference on Radar Meteorology, Vol. 31. Long Beach, CA. Amer. Meteor. Soc., Boston.

93. Zhang, G., J. Vivekanandan and E.A. Brandes, 2003: Constrained Gamma Drop Size Distribution Model for Poloarimetric Radar Rain Estimation: Justification and Development EA, Proceedings, 31st International Conference on Radar Meteorology, Vol. 31. Long Beach, CA. Amer. Meteor. Soc., Boston.

94. Haggerty, Julie A., J. Vivekanandan and D. Serke, 2004: Evaluation of satellite and radar cloud retrieval methods during IMPROVE-2 icing events. Proceedings, Conference on Aviation, Range and Aerospace Meteorology, October, Hyannis, MA. Amer. Meteor. Soc., Boston, Vol. 11.

95. Vivekanandan, J.; Politovich, M.; Rilling, R.; Ellis, S.; Pratte, F. 2004: Sensitivity of S- and K~a-band matched dual-wavelength radar system for detecting nonprecipitating cloud. Proceedings- SPIE the international society for optical engineering, Vol 5654 Page(s): p. 14-24.

96. Zhang, G., J. Vivekanandan and M.K. Politovich, 2004: Radar/radiometer combination to retrieve cloud characteristics for icing detection Proceedings, Conference on Aviation, Range, and Aerospace Meteorology, October, Hyannis, MA. Amer. Meteor. Soc., Boston, Vol. 11.

97. Anagnostou, M.N., E.N. Anagnostou and J. Vivekanandan, 2005: Experimental investigation of X-band polarimetric algorithm for drop size distribution retrieval. Proceedings, 32^nd Conf. on Radar Meteorology, October. Albuqerque, NM. Amer. Meteor. Soc., Boston.

98. Ellis, S., J. Vivekanandan, K. Goodman and C. Kessinger, 2005: Water vapor and liquid water estimates using simultaensous S and KA band radar measurements. Proceedings, 32^nd Conf. on Radar Meteorology, October. Albuqerque, NM. Amer. Meteor. Soc., Boston.

99. Farquaharson, G., F. Pratte, M. Pipersky, D. Ferraro, A. Phinney, E. Loew, R. Rilling, S. Ellis and J. Vivekanandan, 2005: NCAR S-Pol second frequency (KA-band) radar. Proceedings, 32^nd Conf. on Radar Meteorology, October. Albuqerque, NM. Amer. Meteor. Soc., Boston.

100. Serke, D.J., G. Zhang, J. Vivekanandan, T. Schneider, P. Minnis and M. Poellot, 2005: Verification of S-polka KA band radar/radiometer LWC and res retrievals with grids retrievals and aircraft measurements and comparison to GOES icing products for the WISP94 10-11 March event. Proceedings, 32^nd Conf. on Radar Meteorology, October. Albuqerque, NM. Amer. Meteor. Soc., Boston.

101. Deeter, M.N. and Vivekanandan, J. 2006: New Method for Retrieving Liquid Water Path over Land using AMSR-E Observations, American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 USA, [URL:http://ams.confex.com/ams/htsearch.cgi]

102. Vivekanandan, J., 2006: Automatic Classification of Hydrometeor Types Using Polarization Radar Observations. Invited Presentation. IEEE Geoscience and Remote Sensing Symposium, 31 July- 4 August 2006, Denver, Colorado.

103. Deeter, M.N. & Vivekanandan, J. 2006, Retrievals of liquid water path based on AMSR-E observations during AIRS II, American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 USA, [URL:http://ams.confex.com/ams/htsearch.cgi]; Range, and Aerospace Meteorology.

104. Anagnostou, M., Anagnostou, E.N. & Vivekanandan, J. 2006, Experimental Investigation of X-band Polarimetric Algorithms for Attenuation Correction and the Retrieval of Raindrop Size Distribution, American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 USA, [URL:http://www.agu.org]

105. Anagnostou, M.N.; Anagnostou, E.N.; Vulpiani, G.; Montopoli, M.; Vivekanandan, J., 2007: Evaluation of X-band polarimetric radar estimates of drop size distributions from coincident S-band polarimetric estimates and measured raindrop spectra .IEEE Geoscience and Remote Sensing Symposium, 32, 2007, 3575-3578.

106. Farquharson, G., Loew, E., Lee, W. and Vivekanandan, J. 2007, A new high-altitude airborne millimeter-wave radar for atmospheric research, American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 USA, [URL:http://ams.confex.com/ams/htsearch.cgi].

107. Farquharson, G.; Loew, E.; Vivekanandan, J.; Wen-Chau Lee, 2007, A new high-altitude airborne millimeter-wave radar for atmospheric research.Geoscience and Remote Sensing Symposium, 2007. IGARSS 2007. IEEE International

109. Padmanabhan, S.; Reising, S.C.; Iturbide-Sanchez, F.; Vivekanandan, J., 2007: Estimation of 3-D Water vapor distribution using a network of compact microwave radiometers. IEEE Geoscience and Remote Sensing Symposium, 32, 2007, 251-254.

110. Moore, J.A., Vivekanandan, J., Lee, W., Loew, E., Mayor, S. & Spuler, S. 2007, Development of an advanced radar and lidar platform suite for interdisciplinary airborne and ground-based gemote-sensing research, American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 USA, [URL:http://ams.confex.com/ams/htsearch.cgi].

111. Padmanabhan, S.; Reising, S.C.; Vivekanandan, J., 2008: .. Retrieval of 3-D Water Vapor Field Using a Network of Scanning Compact Microwave Radiometers. IEEE Geoscience and Remote Sensing Symposium, 33, pages II249-252.

112. Vivekanandan, J. , E. Loew, and W. Lee, S. Spuler and T. Weckwerth, 2009: Weather Radars and Lidar for Observing the Atmosphere. 34th AMS Conference on Radar Meteorology.

113. Chang, W., J. Vivekanandan, T.C. Wang and P.Lin, 2009: Estimation of Attenuation at X-band Using Propagation Phase and Differential Reflectivity. 34th AMS Conference on Radar Meteorology.

114. Vivekanandan, J., E. Loew, and W. Lee: 2009: Advanced Ground-based and

Airborne WeatherRadars for Observing Atmosphere. International Radar

Symposium. India.

115. Vivekanandan, J., 2010: Weather radars and lidars for observing atmosphere. http://meetingorganizer.copernicus.org/EGU2010/EGU2010-15255.pdf European Geophysical Union meeting, Vienna, Austria.

116. Reising, S.C., S. Sahoo, S. Padmanabhan, J. Vivekanandan, N. Pierdicca, D. Cimini, E. Pichelli, F. Iturbide-Sanchez, 2010: 3-D humidity retrieval using a network of compact microwave radiometers to correct for variations in wet tropospheric path delay in spaceborne interferometric SAR imagery. 11the Specialist Meeting on Microwave Radiometry and Remote Sensing of the environment. Washington D.C., USA. http://www.microrad2010.org/Papers/ViewPapers.asp?PaperNum=1184

117. Sahoo, S., S.C. Reising, S. Padmanabhan, J. Vivekanandan, F. T. Sanchez, N.

Pierdicca, E. Pichelli, and D. Cimini, 2010: 3-D hymidity retrieval using a network

of compact microwave radiometers to correct for wet tropospheric path delay

variations in spaceborne interferometric SAR imagery. URSI National Radio

Science Meeting, Boulder, CO.

118. Wolde, M., S. Haimov, D. Marcotte, G. Isaac, J. Vivekanandan, and A. Korolev, 2010: Hydrometeor identification from W-band polarimetric measurements. IEEE Geoscience and Remote Sensing Symposium. Honolulu, Hawaii.

119. Sahoo, S., S.C. Reising, S. Padmanabhan, D. Cimini, J. Vivekanandan, F. T.

Sanchez, and N. Pierdicca, 2010: Use of network of compact microwave

radiometers to retrieve 3-D water vapor to estimate wet tropospheric path delay

variations in spaceborne interferrometric SAR imagery. IEEE Geoscience and

Remote Sensing Symposium. Honolulu, Hawaii.

120. Sahoo, S., S.C. Reising, and J. Vivekanandan, 2011: Trade-off between vertical

resolution and accuracy from ground-based microwave brightness temperature

measurements. URSI National Radio Science Meeting, Boulder, CO.

121. Vivekanandan, J., E. Loew, S. Spuler, B. Morley, W. Lee, and E. Eloranta, 2011: Airborne cloud radar and lidar fort sensing aerosol and clouds. European Geophysical Union meeting, Vienna, Austria. http://meetingorganizer.copernicus.org/EGU2011/EGU2011-8509.pdf

122. Sahoo, S.; Reising, S.C.; Vivekanandan, J., 2011, Trade-off between retrievals fr ground-based microwave brightness temperature measurements. General Assembly and Scientific Symposium, 2011 XXXth URS Digital Object Identifier:

10.1109/URSIGASS.2011.6050842 Publication Year: 2011 , Page(s): 1 - 4

123. Morley, Bruce, Spuler, Scott, Vivekanandan, Jothiram, Hayman, Matthew and

Eloranta, Edwin, 2012: Airborne and ground-based measurements with the NCAR

GVHSRL, 16^th International Symposium for the Advancement of Bouldary-Layer

Remote Sensing, 5-8 June 2012, Boulder, Co

124. Morley, Bruce, Spuler, Scott M., Razenkov, I.A., Vivekanandan, Jothiram and

Eloranta, Edwin, 2012: Airborne and Ground Measurements with a High Spectral Resolution Lidar, 26^th International Laser Radar Conference, 25-29 June, 2012, Porto Heli Greece.

125. Vivekanandan, J., E. Eloranta, S. Spuler, and B. Morley, 2012: Calibration of

High spectral resolution lidar. European Geophysical Union meeting, Vienna, Austria.

Publications and Presentations (99)
Title	Source	Date
Estimating polarization purity with noise	IEEE Transactions on Geoscience and Remote Sensing	2024-01-01
Characterization of Southern Ocean boundary layer clouds using airborne radar, lidar, and in situ cloud data: Results from SOCRATES	Journal of Geophysical Research: Atmospheres	2022-11-16
Cloud and precipitation particle identification using cloud radar and Lidar measurements: Retrieval technique and validation	Earth and Space Science	2022-05-01
The life cycle of a stationary cloud cluster during the Indian summer monsoon: A microphysical investigation using polarimetric C-band radar	Monthly Weather Review	2021-11-01
The NCAR airborne 94-ghz cloud radar: Calibration and data processing	Data	2021-06-19
A technique for estimating liquid droplet diameter and liquid water content in stratocumulus clouds using radar and lidar measurements	Journal of Atmospheric and Oceanic Technology	2020-11-01
Microphysical properties of generating cells over the Southern Ocean: Results from Socrates	Journal of Geophysical Research: Atmospheres	2020-07-16
Use of the Earthâ€™s surface as a reference to correct airborne nadir-looking radar radial velocity measurements for platform motion	Journal of Atmospheric and Oceanic Technology	2019-07-01
Merged cloud and precipitation dataset from the HIAPER GV for the Cloud System Evolution in the Trades (CSET) campaign	Journal of Atmospheric and Oceanic Technology	2019-06-01
Current status and future challenges of weather radar polarimetry: Bridging the gap between radar meteorology/hydrology/engineering and Numerical Weather Prediction	Advances in Atmospheric Sciences	2019-06-01
Cloud System Evolution in the Trades (CSET): Following the evolution of boundary layer cloud systems with the NSF–NCAR GV	Bulletin of the American Meteorological Society	2019-01-01
Airborne polarimetric Doppler weather radar: Trade-offs between various engineering specifications	Geoscientific Instrumentation, Methods and Data Systems	2018-01-30
The ice water paths of small and large ice species in hurricanes Arthur (2014) and Irene (2011)	Journal of Applied Meteorology and Climatology	2017-05-01
Finescale structure of a snowstorm over the northeastern United States: A first look at high-resolution HIAPER cloud radar observations	Bulletin of the American Meteorological Society	2017-02-01
Recommendations for improving U.S. NSF-supported airborne microwave radiometry	Bulletin of the American Meteorological Society	2016-12-01
Quantitative precipitation estimation of the epic 2013 Colorado flood event: Polarization radar-based variational scheme	Journal of Applied Meteorology and Climatology	2016-07-01
Retrieval of slant water vapor path and slant liquid water from microwave radiometer measurements during the DYNAMO Experiment	IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing	2015-09-01
Optimization of background information and layer thickness for improved accuracy of water-vapor profile retrieval from ground-based microwave radiometer measurements at K-band	IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing	2015-09-01
A wing pod-based millimeter wavelength airborne cloud radar	Geoscientific Instrumentation, Methods and Data Systems	2015-04-14
Radiometric information content for water vapor and temperature profiling in clear skies between 10 and 200 GHZ	IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing	2015-02-01
The next generation airborne polarimetric Doppler weather radar	Geoscientific Instrumentation, Methods and Data Systems	2014-07-21
Estimation of X-band polarimetric radar attenuation and measurement uncertainty using a variational method	Journal of Applied Meteorology and Climatology	2014-04-01
Radar observations and radar model computations of biological scatterers [presentation]	36th Conference on Radar Meteorology	2013-09-18
Design and development of a 2-D electronically scanned, dual-polarization, Line Replaceable Unit (LRU) for airborne phased array radar for atmospheric research [presentation]	36th Conference on Radar Meteorology	2013-09-16
Design considerations for developing airborne dual-polarization dual-doppler radar [poster]	36th Conference on Radar Meteorology	2013-09-16
The Next Generation Airborne Polarimetric Doppler Radar [presentation]	EGU General Assembly 2013	2013-04-08
Airborne Phased Array Radar (APAR) [poster]	Community Workshop on Radar Technologies 2012	2012-11-27
Remote sensing of precipitation, cloud, aerosol and water vapor using radar, lidar and microwave radiometer [presentation]	Ministry of Earth Sciences Seminar 2013	2012-10-01
Radar calibration and rain rate estimation [presentation]	CAIPEEX Data Workshop 2012	2012-09-24
An overview of the NCAR S-PolKa radar operations during DYNAMO [presentation]	AOGS-AGU (WPGM) Joint Assembly 2012	2012-08-14
An overview of the NCAR S-PolKa radar operations during DYNAMO [presentation]	30th Conference on Hurricanes and Tropical Meteorology	2012-04-15
Three-dimensional humidity retrieval using a network of compact microwave radiometers to correct for variations in wet tropospheric path delay in spaceborne interferometric SAR imagery	IEEE Transactions on Geoscience and Remote Sensing	2011-05-16
Liquid water content estimates using simultaneous S and Ka-band radar measurements	Radio Science	2011-04-29
Water vapor estimates using simultaneous dual-wavelength radar observations	Radio Science	2010-09-04
Retrieval of atmospheric water vapor density with fine spatial resolution using three-dimensional tomographic inversion of microwave brightness temperatures measured by a network of scanning compact radiometers	IEEE Transactions on Geoscience and Remote Sensing	2009-11-02
Ground-based and airborne weather radars and lidar for observing atmosphere [presentation]	34th Conference on Radar Meteorology	2009-10-08
Progress update on NCAR radar remote sensing software [poster]	34th Conference on Radar Meteorology	2009-10-05
Ground-based passive microwave profiling during dynamic weather conditions	Journal of Atmospheric and Oceanic Technology	2009-06-01
Evaluation of x-band polarimetric-radar estimates of drop-size distributions from coincident s-band polarimetric estimates and measured raindrop spectra	IEEE Transactions on Geoscience and Remote Sensing	2008-10-01
Comparison of two raindrop size distribution retrieval algorithms for X-band dual polarization observations	Journal of Hydrometeorology	2008-06-01
Retrieveal of 3-D water vapor field using a remote sensor network of scanning compact microwave radiometers [presentation]	12th Conference on IOAS-AOLS	2008-01-20
Development of advanced radar and lidar platform suite for interdisciplinary airborne and ground-based remote-sensing research [poster]	33rd Conference on Radar Meteorology	2007-08-07
A new high-altitude airborne millimeter-wave radar for atmospheric research [presentation]	33rd Conference on Radar Meteorology	2007-08-07
Sources of error in dual-wavelength radar remote sensing of cloud liquid water content	Journal of Atmospheric and Oceanic Technology	2007-08-01
Evaluation of a polarization radar-based hydrometeor classification algorithm through the analysis of microphysical data in an orographic environment [presentation]	29th International Conference on Alpine Meteorology	2007-06-04
Comparison of raindrop size distribution estimates, from X-band and S-band polarimetric observations	IEEE Geoscience and Remote Sensing Letters	2007-01-01
Analysis of microphysical data in an orographic environment to evaluate a polarization radar-based hydrometeor classification scheme [presentation]	12th Conference on Mountain Meteorology	2006-09-28
Analysis of microphysical data in an orographic environment to evaluate a polarization radar-based hydrometeor classification scheme [presentation]	4th European Conference on Radar in Meteorology and Hydrology	2006-09-18
Water vapor and liquid water estimates using simultaneous S and Ka band radar measurements [presentation]	4th European Conference on Radar in Meteorology and Hydrology	2006-09-18
Correction for rain path specific and differential attenuation of x-band dual-polarization observations	IEEE Transactions on Geoscience and Remote Sensing	2006-09-01
New dual-frequency microwave technique for retrieving liquid water path over land	Journal of Geophysical Research-Atmospheres	2006-08-08
Experimental investigation of x-band polarimetric algorithms for attenuation correction and the retrieval of raindrop size distribution [presentation]	2006 AGU Joint Assembly	2006-05-24
New method for retrieving liquid water path over land using AMSR-E observations [presentation]	14th Conference on Satellite Meteorology and Oceanography	2006-01-29
Retrievals of liquid water path based on AMSR-E observations during AIRS II [presentation]	12th Conference on Aviation Range and Aerospace Meteorology	2006-01-28
NCAR S-Pol second frequency (Ka-band) radar [poster]	32nd Conference on Radar Meteorology	2005-10-24
Water vapor and liquid water estimates using simultaneous S and Ka band radar measurements [presentation]	32nd Conference on Radar Meteorology	2005-10-24
Verification of S-Polka Ka band radar/radiometer LWC and RES retrievals with GRIDS retrievals and aircraft measurements and comparison to GOES icing products for the WISP04 10-11 March event [presentation]	AMS International Conference on Radar Meteorology	2005-10-22
Experimental investigation of x-band polarimetric algorithm for drop size distribution retrieval [presentation]	34th Conference on Broadcast Meteorology	2005-07-31
Water vapor and liquid water estimates using simultaneous S and Ka band radar measurements [presentation]	34th Conference on Broadcast Meteorology	2005-07-31
AMSU-B observations of mixed-phase clouds over land	Journal of Applied Meteorology and Climatology	2005-01-01
Radar/radiometer combination to retrieve cloud characteristics for icing detection [presentation]	11th Conference on Aviation, Range, and Aerospace Meteorology	2004-10-06
Evaluation of satellite and radar cloud retrieval methods during IMPROVE-2 icing events [presentation]	11th Conference on Aviation, Range, and Aerospace Meteorology	2004-10-03
Performance of correlation estimators for spaced-antenna wind measurement in the presence of noise	Radio Science	2004-06-26
Comparison of polarimetric radar drop size distribution retrieval algorithms	Journal of Atmospheric and Oceanic Technology	2004-04-01
Polarimetric radar estimators based on a constrained gamma drop size distribution model	Journal of Applied Meteorology	2004-02-01
Angular and range interferometry to measure wind	Radio Science	2003-12-18
Constrained gamma drop size distribution model for poloarimetric radar rain estimation: Justification and development [presentation]	31st International Conference on Radar Meteorology	2003-08-06
Doppler wind analysis of the airflow in a stratiform frontal rainband in the Pacific Northwest using a bistatic radar network [presentation]	31st International Conference on Radar Meteorology	2003-08-05
The shape-slope relation in observed gamma raindrop size distributions: Statistical error or useful information?	Journal of Atmospheric and Oceanic Technology	2003-08-01
Preface to special section: Remote sensing of the Earth's environment by microwave radiometers and radar	Radio Science	2003-06-01
An evaluation of a drop distribution-based polarimetric radar rainfall estimator	Journal of Applied Meteorology	2003-05-01
Cross-correlation ratio method to estimate cross-beam wind and comparison with a full correlation analysis	Radio Science	2003-03-27
Radar reflectivity calibration using differential propagation phase measurement	Radio Science	2003-03-12
Snow nowcasting using a real-time correlation of radar reflectivity with snow gauge accumulation	Journal of Applied Meteorology and Climatology	2003-01-06
First radar echoes and the early ZDR history of Florida cumulus	Journal of the Atmospheric Sciences	2002-05-01
Polarimetric radar observations and interpretation of co-cross-polar correlation coefficients	Journal of Atmospheric and Oceanic Technology	2002-03-01
Effects of random inhomogeneity on radar measurements and rain rate estimation	IEEE Transactions on Geoscience and Remote Sensing	2002-01-01
An assessment of droplet size and liquid water content derived from dual-wavelength radar measurements to the application of aircraft icing detection	Journal of Atmospheric and Oceanic Technology	2001-11-01
Detection of snow and ice crystals using polarization radar measurements: Comparison between ground-based in situ and S-Pol observations	Atmospheric Research	2001-10-01
Testing a procedure for automatic classification of hydrometeor types	Journal of Atmospheric and Oceanic Technology	2001-06-01
A method for estimating rain rate and drop size distribution from polarimetric radar measurements	IEEE Transactions on Geoscience and Remote Sensing	2001-04-01
The estimation of snowfall rate using visibility	Journal of Applied Meteorology 1989-2005 (After 2005 - Journal of Applied Meteorology and Climatology)	1999-10-01
A comparison of radar reflectivity estimates of rainfall from collocated radars	Journal of Atmospheric and Oceanic Technology	1999-09-01
Retrieval of atmospheric liquid and ice characteristics using dual-wavelength radar observations	IEEE Transactions on Geoscience and Remote Sensing	1999-09-01
Propagation delays induced in GPS signals by dry air, water vapor, hydrometeors, and other particulates	Journal of Geophysical Research-Atmospheres	1999-04-27
Cloud microphysics retrieval using S-band dual-polarization radar measurements	Bulletin of the American Meteorological Society	1999-03-01
Microwave radiometric technique to retrieve vapor, liquid and ice. I. Development of a neural network-based inversion method	IEEE Transactions on Geoscience and Remote Sensing	1997-03-01
Microwave radiometric technique to retrieve vapor, liquid and ice. II. Joint studies of radiometer and radar in winter clouds	IEEE Transactions on Geoscience and Remote Sensing	1997-03-01
A study of thunderstorm microphysics with multiparameter radar and aircraft observations	Monthly Weather Review	1995-11-01
Dual-channel and multifrequency radar system calibration	IEEE Transactions on Geoscience and Remote Sensing	1995-03-01
Boundary-layer clear-air radar echoes - origin of echoes and accuracy of derived winds	Journal of Atmospheric and Oceanic Technology	1994-10-01
Active and passive microwave remote-sensing of precipitating storms during CaPE. Part II. Advanced microwave precipitation radiometer and polarimetric radar measurements and models	Meteorology and Atmospheric Physics	1994-03-01
Active and passive remote-sensing of precipitating storms during CaPE Part II. Intercomparison of precipitation retrievals over land from AMPR radiometer and CP-2 radar	Meteorology and Atmospheric Physics	1994-03-01
Polarimetric radar studies of atmospheric ice particles	IEEE Transactions on Geoscience and Remote Sensing	1994-01-01
Spatial and frequency averaging techniques for a polarimetric scatterometer system	IEEE Transactions on Geoscience and Remote Sensing	1994-01-01
Polarimetric radar modeling of mixtures of precipitation particles	IEEE Transactions on Geoscience and Remote Sensing	1993-09-01
Comparisons of precipitation measurements by the Advanced Microwave Precipitation Radiometer and multiparameter radar	IEEE Transactions on Geoscience and Remote Sensing	1993-07-01
Multiparameter radar measurements in Colorado convective storms. Part II. Hail detection studies	Journal of the Atmospheric Sciences	1986-11-15
Multiparameter radar measurements in Colorado convective storms. Part I. Graupel melting studies	Journal of the Atmospheric Sciences	1986-11-15

Curriculum Vitae

CURRICULUM VITAE

JOTHIRAM VIVEKANANDAN (Vivek)

Educational Information:

1986 Ph.D. Colorado State University, Fort Collins, Colorado

(Electrical Engineering)

1981 M.Tech. Indian Institute of Technology, India

(Microwave and Radar Engineering)

1979 B.E. Madurai-Kamaraj University, India

(Electronics and Communications Engineering)

Publications, book review, patents, and field projects:

Number of refereed papers: 65

Patents awarded: 3

Book review report to EOS: 1

Number of un-refereed papers: ~ 125

Number of field projects: 24

Mentoring

1984 -1986 GRA at ASP: The co-advising that I received from Rit Carbone during my ASP GRA appointment was a key catalyst for transferring technology from Colorado State University’s Electrical Engineering department to NCAR. Over the years, it helped establish a sustained world-renowned research program in radar remote sensing at CSU. This timely interaction propelled both NCAR and CSU to the forefront of polarization radar research in the late 1980s.

1991-1995 Visiting scientist at the Swedish Institute of Space Physics,

Kiruna, Sweden: Taught courses, served as a primary advisor for one M.S. and one Ph.D. scholars. Also, guided a visiting post-doctoral fellow from Russia.

2006 Faculty Fellowship Award: A short course on Field Programmable Gated Array (FPGA) was offered by a Professor from Texas A&M. This course was instrumental for developing modern radar digital receivers based on FPGA that are small and robust. Today almost all of the instruments in the EOL are taking advantage of FPGA technology.

2009: Taught classes in 2009 ASP summer colloquium, "Exploring the Atmosphere, Observational Instruments and Techniques.”

Work History:

2006 – present: Senior Scientist.

2010 – present Member of the AMS Radar Committee

2005 – 2010: Manager of Remote Sensing Facility, Earth Observing Laboratory.

1996 – 2006: Scientist III, National Center for Atmospheric Research

Earth Observing Laboratory and Research Applications Program.

1993 - 1996 Scientist II, National Center for Atmospheric Research

Research Applications Program.

1991 - 1995 Visiting Scientist at the Swedish Institute of Space Physics,

Kiruna, Sweden.

1991 - 1993 Scientist I, National Center for Atmospheric Research

Research Applications Program.

1987 - 1991 Research Associate, Department of Electrical Engineering,

Colorado State University, Fort Collins, Colorado.

1986 - 1987 Postdoctoral Fellow, Department of Electrical Engineering,

Colorado State University, Fort Collins, Colorado.

1984 - 1986 Graduate Research Assistant, Advanced Study Program,

National Center for Atmospheric Research, Boulder, Colorado.

1982 - 1984 Graduate Research Assistant, Department of Electrical Engineering,

Colorado State University, Fort Collins, Colorado.

1982 Graduate Teaching Assistant, Department of Electrical Engineering

Colorado State University, Fort Collins, Colorado.

1981 Research Associate, Center for Systems and Devices,

Indian Institute of Technology, Madras, India.

Scientific/Technical Accomplishments

Awarded patent for Ice Detection Using Radiometer. A ground-based multi-frequency microwave radiometer instrument for simultaneous estimation of total column of vapor, liquid ( Vivek, 1999).

Awarded patent for Temperature Estimate of a Physical Medium Using Remote Sensors (Vivek and Guifu Zhang, 2003).

Awarded patent for Three Dimensional Velocity of a Object ( Guifu Zhang, Doviak and Vivek, 2004).

Community Service

2012 External Advisory Board Member for Atmospheric Research Radar Center (ARRC), Univ. of Oklahoma

2012 Invited to write assessment letter for Professorship by University of Oklahoma

2011-present Chief Executive Editor for Geoscientific Instrumentation, Methods, and Data systems

2010 Invited by EGU to assess need for a journal in then area of geoscientific instrumentation

2010 Invited to write Assessment letter for Professorship by University of Oklahoma

2009 Invited to write Assessment letter for Professorship by University of Oklahoma

2010 Invited presentation at North Carolina A&T State University NOAA-ISET Center and discussions with faculties and students.

2010 -2011 ASP Postdoctoral Fellowship search committee representative.

2010 Member of the Mentoring Project volunteers team. Propose models to the President’s council for a long-term mentoring program.

2010 ARG Sun-committee member

2009 Invited speaker at University of Washington colloquium series.

2008 - present Adjunct Affiliate at the Colorado State University, Fort Collins, Colorado.

2008 – present Graduate Faculty at the University of Washington, Seattle.

2006 - 2011 Faculty Affiliate at the University of Colorado, Boulder.

2005-present Session organizer for the General Assembly of the European Geoscience Union (EGU).

2004-2005: Radar group leader.

2003-present: Associated Editor for Radio Science journal publication.

2003-2007: Adjunct faculty at the University of Connecticut. Member of Ph.D. dissertation committees.

2001- present: Executive steering committee member of the Microwave Radiometric Symposium.

2001 Co-chaired and organized International Microwave Radiometric and Radar Symposium at Boulder, Colorado.

2002: Co-Edited a two-part Radio Science Special Section Remote Sensing of the Earth's Environment by Microwave Radiometers and Radar.

2001-present: Successfully lead the development of Ka-band radar and collected data. Worked closely with FAA and ATD for the secure the funding and motivated the engineering team to field the radar for the WISP04 and RICO field programs.

2000: Chairman for a session on Clouds and Precipitation at International Geoscience and Remote Sensing Symposium, Hawaii.

2001: Invited presentation at AMS Workshop on Radar Reflectivity Calibration Using Propagation Phase Measurements. Workshop on Radar Calibration (RADCAL), 13-14 January. Albuquerque, NM. Amer. Meteor. Soc., Boston.

1997- 2005: Lead scientist for S-Pol

2003: Co-Chaired Radar Development and Applications Workshop at National Center for Atmospheric Research, Boulder, Colorado.

2003-2004: Scientist Group Lead at Research Technology Facility.

2001: Co-Chairman for Specialist Meeting on Microwave Remote Sensing, 6-8 November 2001, Boulder, Colorado. This meeting aims to provide an international forum for reporting recent advances in microwave radiometry and radar.

1999: Presented an invited talk on Radar Remote sensing of cloud micro-physics and rain rate estimation at WMO Workshop on Hygroscopic Seeding, Mexico. Wrote a joint report for the WMO document.

1998: Mentor for a Summer Employment Program (SEP) student

1996 - 2006: In Flight Icing product development team member.

1993 – 2007 Adjunct Graduate Faculty at the University of Washington, Seattle.

1993 - 1994 Collaborative polarimetric radar studies with Rutherford Appleton

Laboratory, United Kingdom.

1991 Co-Chairman of the Inverse Scattering Methods in Progress in Electromagnetic Research Symposium, Boston, MA.

1991 - 1995 Thesis Advisor, Umea University, Sweden.

Honors and Awards

Elected to Senior Member of IEEE

UCAR/NCAR Outstanding publication Award 2000 for "The estimation of snowfall rate using visibility," Journal of Applied Meteorology 38, 1542–1563. Because of this work, airlines have improved the procedures they use to estimate snowfall rates.

Nominated for the 2003 Outstanding Publication Award at NCAR for a journal paper that dealt with raindrop size distribution and rain rate retrieval using polarization radar observations.

Nominated for the 2001 Outstanding Publication Award at NCAR for a journal paper that dealt with hydrometeor classification using polarization radar measurements.

Nominated for the 1994 Outstanding Publication Award at NCAR for a journal paper that dealt with active and passive remote sensing of clouds and precipitation.

1993 –present Commission F (Wave Propagation and Remote Sensing) of the U.S. National Committee of the International Union of Radio Science.

1993 Invited Presenter in Microwave Radiometry at the XXIV General Assembly of the International Union of Radio Science, Kyoto, Japan.

Ranked first in the master's degree program.

Ranked first in the university undergraduate degree program.

Merit Scholarship recipient during undergraduate and pre-university education.

Links

Geoscientific Instrumentation Methods and data systems

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Information

Guifu Zhang; Doviak, R.J.; Vivekanandan, J., Range interferometry technique to determine radial wind. Geoscience and Remote Sensing Symposium, 2002. IGARSS '02. 2002 IEEE International

56. Anagnostou,M.N.; Anagnostou,E.N.; Vivekanandan, J., 2006, Correction for Rain Path Specific and Differential Attenuation of X-Band Dual-Polarization Observations. Geoscience and Remote Sensing, IEEE Transactions, 44(9), 2470-2480

56. Guifu, Zhang; Vivekanandan, J, 1999: Microwave radiation from mixed phase cloud and parameter retrievals. Geoscience and Remote Sensing Symposium, IGARSS ’99 Proceedings. IEEE 1999 International. Volume:4

70. Zmic, D.S.; Ryzhkov, A.; Straka, J.; Yidi Liu; Vivekanandan, J.; 2000: Sensitivity of an automatic procedure for hydrometeor classification. Geoscience and Remote Sensing Symposium, 2000. Proceedings. IGARSS 2000. IEEE 2000 International

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