Home Vita Research Rain Events Data Courses Students

Vita


Guifu Zhang


University of Oklahoma
School of Meteorology
120 David L. Boren Blvd., Suite 5900
Norman, OK 73072-7307
Ph: (405)325-3507 Fax: (405)325-7689
E-mail: guzhang1@ou.edu

Education:


01/96 - 07/98 Ph.D. University of Washington, Seattle, WA (Electrical Engineering)
09/82 - 07/85 M.S. Wuhan University, P.R. China (Radio Physics)
09/78 - 07/82 B.S. Anhui University, P.R.China (Physics)

Professional Experience:

Chronological

2005.7 - Associate Professor, University of Oklahoma/School of Meteorology, USA
2004.7 - 2005.7 Scientist II, National Center for Atmosphere Research, USA
2001 - 2004 Scientist I, National Center for Atmosphere Research, USA
1999 - 2000 Project Scientist I, National Center for Atmosphere Research, USA
1998 - 1999 Visitor, National Center for Atmosphere Research, USA
1996 - 1998 Research Assistant, Dept. of EE, University of Washington, Seattle, USA
1993 - 1995 Visiting Scientist, Dept. of EE, University of Washington, Seattle, USA
1990 - 1993 Associate Professor, Space Physics Dept., Wuhan University, P.R.China
1989 - 1990 Visiting Scholar, Communication Research Laboratory, Japan
1985 - 1989 Instructor, Space Physics Dept., Wuhan University, P.R. China

Current Research Interests

Teaching Activities

Memberships and Awards

Professional Service

Publications:

Refereed Publications

  1. Le, K. D., R. D. Palmer, B. L. Cheong, T.-Y. Yu, G. Zhang, and S. M. Torres, Reducing the Effects of Noise on Atmospheric Imaging Radars Using Multi-Lag Correlation, Radio Science, Submitted, July 2008.
  2. Zhang, G., R. J. Doviak, D. S. Zrnic, and J. E. Crain, Phased array radar polarimetry for weather sensing: A formulation for polarization calibration, IEEE Trans. on Geoscience and Remote Sensing, submitted, July 2008.
  3. Jung, Y., M. Xue, and G. Zhang, The estimation of microphysical parameters and atmospheric state using simulated polarimetric radar data and ensemble Kalman filter in the presence of observation operator error. Mon. Wea. Rev., submitted, July 2008.
  4. Xue, M., M. Tong, and G. Zhang, Attenuation correction and direct assimilation of attenuated radar reflectivity data using ensemble Kalman filter: Tests with simulated data, Quart. J. Royal Meteor. Soc., submitted, June 2008.
  5. Cao, Q., and G. Zhang, Errors in Estimating Raindrop Size Distribution Parameters: A Study based on Simulation and Real Data, J. Appl. Meteor. Climat, In press, 2008.
  6. Zhang, G., M. Xue, Q. Cao, and D. Dawson, Diagnosing the intercept parameter for exponential raindrop size distribution based on video disdrometer observations: Model development, J. Appl. Meteor. Climat, In press, 2008.
  7. Zhang, G., and R. J. Doviak, Spaced antenna interferometry to detect and locate subvolume inhomogeneities of reflectivity: an analogy with monopulse radar, J. Atmos. Ocean. Tech., In press, 2008.
  8. Le, K. D., R. D. Palmer, B. L. Cheong, T.-Y. Yu, G. Zhang, and S. M. Torres, On the use of auxiliary receive channels for clutter mitigation with phased array weather radars, IEEE Transactions on Geoscience and Remote Sensing, In press, 2008.
  9. Jung, Y., G. Zhang, and M. Xue, Assimilation of simulated polarimetric radar data for a convective storm using ensemble Kalman filter. Part I: Observation operators for reflectivity and polarimetric variables, Mon. Wea. Rev., 136, 2228–2245, 2008.
  10. Jung, Y., M. Xue, G. Zhang, and J. Straka, Assimilation of simulated polarimetric radar data for a convective storm using ensemble Kalman filter. Part II: Impact of polarimetric data on storm analysis, Mon. Wea. Rev., 136, 2246–2260, 2008.
  11. Cao, Q., G. Zhang, E. Brandes, T. Schuur, A. Ryzhkov, and K. Ikeda: Analysis of video disdrometer and polarimetric radar data to characterize rain microphysics in Oklahoma, J. Appl. Meteor. Climat. In press, 2008.
  12. Xue, M., Y. Jung, and G. Zhang, Error modeling of simulated reflectivity observations for ensemble Kalman filter data assimilation of convective storms, Geophys. Res. Letters, 34, L10802, doi:10.1029/2007GL029945, 2007.
  13. Zhang, G., and R.J. Doviak: Spaced antenna interferometry to measure crossbeam wind, shear, and turbulence: Theory and formulation, J. Atmos. Ocean. Tech., 24(5), 791-805, 2007.
  14. Brandes, E. A., K. Ikeda, G. Zhang, M. Schönhuber, and R. M. Rasmussen, A statistical and physical description of hydrometeor distributions in colorado snowstorms using a video disdrometer, Accepted and to appear in J. Appl. Meteor. Climat., 46(5), 634-650, 2007.
  15. Zhang, G., J. Sun, and E. A. Brandes, Improving parameterization of rain microphysics with disdrometer and radar observations, J. Atmos. Sci., 63 (4): 1273-1290, 2006.
  16. Brandes, E. A., G. Zhang, and J. Sun, On the influence of assumed drop size distribution form on radar-retrieved thunderstorm microphysics, J. Appl. Meteor., 45(2): 259-268, 2006.
  17. Yu, T., G. Zhang, A. B. Chalamalasetti, R. J. Doviak, and D. Zrnic, Resolution enhancement using range oversampling, J. Atmos. Ocean. Tech., 23(2): 228-240, 2006.
  18. Zhang, G., T. Yu, and R. J. Doviak, Angular and range interferometry to refine weather radar resolution, Radio Science, vol. 40, RS3013, doi:10.1029/2004RS003125, 2005.
  19. Zhang, G., R. Doviak, J. Vivekanandan, W. Brown, and S. A. Cohn, Performance of correlation estimators for spaced antenna wind measurement in the presence of noise, Radio Science, vol. 39, RS3017, doi:10.29/2003RS003022, 2004.
  20. Doviak, R. J., G. Zhang, S. A. Cohn, and W. Brown, Comparison of spaced-antenna wind estimators: Theoretical and simulation results, Radio Science, vol. 39(1), Art. No. 1006, 2004.
  21. Brandes, E., G. Zhang, and J. Vivekanandan, Comparison of polarimetric radar drop size distribution retrieval algorithm, J. Atmos. Ocean. Tech., vol. 21(4), pp. 576-590, 2004.
  22. Brandes, E., G. Zhang, and J. Vivekanandan, Drop size distribution retrieval with polarimetric radar: model and application, J. Appl. Meteor., vol. 43(3), pp 461-675, 2004.
  23. Vivekanandan, J., G. Zhang, and E. Brandes, Polarimetric Radar Rain Estimators Based on Constrained Gamma Drop Size Distribution Model, J. Appl. Meteor., vol. 43(2), pp 217-230, 2004.
  24. Zhang, G., R. Doviak, J. Vivekanandan, and T. Yu, Angular and range interferometry to measure wind, Radio Science, vol. 38 (6): Art. No. 1106, 2003.
  25. Brandes, E., G. Zhang, and J. Vivekanandan, An evaluation of a drop distribution-based rainfall estimator, J. Appl. Meteor., vol. 42, pp. 652-660, 2003.
  26. Vivekanandan, J., G. Zhang, and S.M. Ellis, Radar reflectivity calibration using differential propagation phase measurement, Radio Science, vol. 38(3), 8050, doi:10.1029/2002RS002673, 2003.
  27. Zhang, G., R. Doviak, J. Vivekanandan, W. Brown, and S. A. Cohn, Cross-correlation ratio method to estimate cross beam wind and comparison with the full correlation analysis, Radio Science, vol. 38(3), Art. No. 8052, doi:10.1029/2002RS002682, 2003.
  28. Zhang, G., J. Vivekanandan, E.A. Brandes, R. Meneghini, and T. Kozu, The shape-slope relation in Gamma raindrop size distribution: statistical error or useful information?, J. Atmos. Ocean. Tech., vol. 20, pp. 1106-1119, 2003.
  29. Brandes, E., G. Zhang, and J. Vivekanandan, Experiments in rainfall estimation with a polarimetric radar in a subtropical environment, J. Atmos. Meteor., 41., pp. 674-685, 2002.
  30. Zhang, G., J. Vivekanandan, and E. Brandes, Effects of random inhomogeneity on radar measurements and rain rate estimation, IEEE Trans. on Geoscience and Remote Sensing, vol. 40, pp 223-227, 2002.
  31. Vivekanandan, J., G. Zhang, M. K. Politovich, An assessment of droplet size and liquid water content using dual-frequency radar measurements for aircraft icing detection, J. Atmos. Oceanic. Technol., vol. 18, pp 1787-1798, 2001.
  32. Zhang, G., J. Vivekanandan, and E. Brandes, A method for estimating rain rate and drop size Distribution from polarimetric radar measurements, IEEE Trans. on Geoscience and Remote Sensing, vol. 39, pp. 831-841, 2001.
  33. Vivekanandan, J., B. Martner, M.K. Politovich, and G. Zhang, Retrieval of Atmospheric Liquid and Ice Characteristics Using Dual-Wavelength Radar Observations, IEEE Trans. on Geoscience and Remote Sensing, vol. 37, pp 2325-2334, 1999.
  34. Kuga, Y., G. Zhang, J. Yea, and A. Ishimaru, Analytical and numerical studies of angular correlation function of waves scattered from randomly distributed cylinders, Waves in Random Media, vol. 8, pp 269-281, 1998.
  35. Kuga, Y., G. Zhang, J. Yea, and A. Ishimaru, The angular correlation function of waves scattered from randomly distributed cylinders, Radio Science, vol. 33, pp 1505-1516, 1998.
  36. Zhang, G., L. Tsang, and K. Pak, Angular correlation function and scattering coefficient of electromagnetic wave scattered by a buried object under a two-dimensional rough surface, Journal of the Optical Society of America, A., vol. 15, pp 2995-3002, 1998.
  37. Zhang, G. and L. Tsang, Application of angular correlation function of clutter scattering and correlation imaging in the target detection, IEEE Trans. on Geoscience and Remote Sensing, vol. 36, pp 1485-1493, 1998.
  38. Zhang, G., L. Tsang, and Y. Kuga, Numerical studies of the Detection of Targets in Clutter by Using Angular Correlation Function and Angular Correlation Imaging, Microwave and Optical Technology Letters, vol. 17, pp 82-86, 1998.
  39. Zhang, G. and L. Tsang, Angular correlation function of wave scattering by a random rough surface and discrete scatterers and its application in the detection of a buried object, Waves in Random Media, vol.7, pp 467-478, 1997.
  40. Zhang, G., T. Tsang, and Y. Kuga, 1997:The angular correlation function of wave scattering by a buried object embedded in random discrete scatterers under a random rough surface, Microwave and Optical Technology Letters, vol. 14, pp 144-151, 1997.
  41. Zhang, G., L. Tsang, and Y. Kuga, Study of angular correlation function of scattering by random rough surface with and without a buried object, IEEE Trans. Geoscience and Remote Sensing, vol. 35, pp 444-453, 1997.
  42. Tsang, L., G. Zhang, and K. Pak, 1996: Detection of a buried object under a single random rough surface with angular correlation function in EM wave scattering, Microwave and Optical Technology Letters, vol. 11, pp 300-304, 1996.
  43. Zhang, G., L. Tsang, and Z. Chen, Collective scattering effects of trees generated by Stochastic Lindenmayer systems, Microwave and Optical Technology Letters, vol. 11, 107-111, 1996.
  44. Chen, Z., L. Tsang, and G. Zhang, 1995: Microwave scattering by vegetation based on wave approach and stochastic Lindenmayer system, Microwave and Optical Technology Letters, vol. 8, pp 30-33, 1995.
  45. Tsang, L., K. H. Ding, G. Zhang, C. Hsu, and J. A. Kong, Backscattering enhancement of volume-surface interaction of a layer of scatterers overlying a homogeneous dielectric half space, IEEE Trans. Antenna & Propagation, vol. 43, pp 488-499, 1995.
  46. Zhang, G., J. Hou, S. Ito and T. Oguchi, Optical wave propagation in random medium composed of both turbulence and particles, Journal of Communication Research Laboratory, vol. 37(151/152), pp 43-62, 1990.

    47. Refereed Journal Publications in Chinese

  47. Zhang, G. and J. Hou, The correlation and spectrum of scattered wave by a composite random medium, Journal of Wuhan University (Special issue on wave propagation), pp 72-78, 1991.
  48. Zhang, G. and J. Hou, The second moment of wave field in composite random medium, Journal of Wuhan University (Natural science edition), pp 47-56, 1990.
  49. Hou, J. and G. Zhang, Wave propagation in composite random medium, Journal of Wuhan University (Natural science edition), pp 31-38, 1989.
  50. Hou, J. and G. Zhang, A study of pulse parameter in random medium, Journal of Wuhan University (Natural science edition), pp 65-72, 1988.
  51. Zhang, G., and J. Hou, 1987, The correlativity of pulse train propagation in random medium, Chinese Journal of Radio Science, vol. 2, pp 17-25, 1987.
  52. Zhang, C., H. Li, G. Zhang, R. Huang, and R. Yan, Rain attenuation on earth-space path at 12GHz - Summary of 3 years, Journal of Wuhan University (Natural science edition), pp 45-52, 1987.

Non-refereed Journal Article

  1. Palmer, R.D., G. Zhang, M. Biggerstaff, P. B. Chilson, J. Crain, S. Torres, M. Yeary, T.Y. Yu, Y. Zhang, Atmospheric Radar Research Center – ARRC, University of Oklahoma, USA, IEEE Geoscience and Remote Sensing Society Newsletter, 2007.

Book Chapter

  1. Chen, Z., L. Tsang, and G. Zhang, Application of stochastic Lindenmayer systems to study collective and cluster scattering in microwave remote sensing of vegetation. Progress in Electromagnetics Research, EMW Publishers, Cambridge, Massacusetts, 14, 233-277, 1996

Patent Awards and Technical Reports

  1. Zhang, G., J. Vivekanandan, R. J. Doviak, A patent #6721678 of "Cross-correlation method for estimating 3-D wind field" by US patent office, 2003.
  2. Vivekanandan, J., and G. Zhang, A patent #6536948 of "Microwave Radar Technique for Retrieving Temperature" by US patent office, 2002.
  3. Kuga, Y., and G. Zhang, &#SAR scene images of trees generated by Lindenmayer systems," submitted to DEMACO Inc., July 31, 1996.
  4. Kuga, Y., and G. Zhang, "Light scattering from a spherical particle embedded in a SiO2 layer," submitted to KLA Instruments Corporation, May 22, 1995.

Conference Presentations/Papers

  1. Ryzhkov, A, G. Zhang, S. Luchs, L. Ryzhkova, “Polarimetric characteristics of snow measured by radar and 2D video disdrometer,” ERAD’08
  2. Doviak, R. J., M. Fang, V. Melnikov, and G. Zhang, “Theoretical and practical considerations in using spectrum width data,” ERAD’08
  3. Dawson, D. T. , M. Xue, J. A. Milbrandt, M.K. Yau, G. Zhang, “Analysis of Low-Level Downdraft, Cold Pool, and Tornado Behavior of Simulated Supercell Storms of the 3 May 1999 Oklahoma Tornado Outbreak with Single and Multi-Moment Microphysics,” US-China Symposium on Meteorology, Feb. 26-28, 2008
  4. Cao, Q., and G. Zhang, “A Bayesian approach to retrieve raindrop size distributions from polarimetric radar measurements,” 24rd Conference on IIPS, AMS Annual Meeting, New Orleans, LA,, January, 2008
  5. Morris, M., P. Chilson, G. Zhang, Q. Cao, R. Palmer, M. Teshiba1, L. Kanofsky1, T. Schuur and A. Ryzhkov, “Validation of Raindrop Size Distributions Retrieved from Polarimetric Radar Variables,” 24rd Conference on IIPS, AMS Annual Meeting, New Orleans, LA, January, 2008
  6. Yeary, M., R. Palmer, M. Xue, Y. Yu, G. Zhang, A. Zahrai, J. Crain, Y. Zhang, R. Doviak, Q. Xu, and P. Chilson, “Introduction to multi-channel receiver development for the realization multi-mission capabilities at the National Weather Radar Testbed,” 24rd Conference on IIPS, AMS Annual Meeting, New Orleans, LA, January, 2008
  7. Zhang, G., R. J. Doviak, C. Curtis, and Q. Cao, “Multi-patterns to Reduce Sidelobe Effects on the National Weather Radar Testbed,” Symposium on Recent Developments in Atmospheric Applications of Radar and Lidar, AMS Annual Meeting, New Orleans, LA, January, 2008
  8. Zhang, G., Q. Cao, M. Xue, P. Chilson, M. Morris, R. Palmer, J. Brotzge, T. Schuur, E. Brandes, K. Iketa, A. Ryzhkov, D. Zrnic, and E. Jessup , “A Field Experiment to Study Rain Microphysics Using Video Disdrometers, A Profiler, and Polarimetric S and X-Band Radars,” Symposium on Recent Developments in Atmospheric Applications of Radar and Lidar, AMS Annual Meeting, New Orleans, LA, January, 2008
  9. Dawson, T. D., M. Xue, J. A. Milbrandt, M. K. Yau, and G. Zhang, “Impact of multi-moment microphysics and model resolution on predicted cold pool and reflectivity intensity and structures in the Oklahoma tornadic supercell storms of 3 May 1999,” 22nd conference on WAF and 18th Conference on NWP, Utah, June 25-29, 2007
  10. Youngsun Jung, M. Xue, G. Zhang, and J. M. Straka, “Assimilation of simulated polarimetric radar data using ensemble Kalman filter: Observation operators and data impact,” 22nd conference on WAF and 18th Conference on NWP, Utah, June 25-29, 2007
  11. Zhang, G., M. Xue, D. Daniel Dawson, and Q. Cao, “Diagnosing the Intercept Parameter for Exponential Rain Drop Size Distribution Based on Video Disdrometer Observations,” 22nd conference on WAF and 18th Conference on NWP, Utah, June 25-29, 2007
  12. Zhang, G., R. J. Doviak, X. Chen, “Spaced-antenna interferometry to locate discrete objects and sub-volume inhomogeneities of reflectivity,” 33rd Radar Conference on Radar Meteorology, Australia, August 6-10, 2007
  13. Chilson, P. B., G. Zhang, T. J. Schuur, L. M. Kanofsky, M. Teshiba, Q. Cao, and M. Van Every, “Coordinated in-situ and remote sensing precipitation measurements at the Kessler Farm Field Laboratory in Central Oklahoma,” 33rd Radar Conference on Radar Meteorology, Australia, August 6-10, 2007
  14. Kanofsky, L.M., P. B. Chilson, T. J. Schuur, G. Zhang, Q. Cao, and E. A. Brandes, “Quantitative precipitation estimation and error analysis with a UHF wind profiling radar and a two-dimensional video disdrometer,” 33rd Radar Conference on Radar Meteorology, Australia, August 6-10, 2007
  15. Teshiba, M., G. Zhang, M. Xue, R. D. Palmer, and P. B. Chilson, “Assimilation of Radar-Retrieved Water Mixing Ratio with the WRF 3DVAR System,” 33rd Radar Conference on Radar Meteorology, Australia, August 6-10, 2007
  16. Le, Khoi D., R. D. Palmer, T. Y. Yu, G. Zhang, S. M. Torres, and B. L. Cheong, “Adaptive Array Processing for Multi-Mission Phased Array Radar,” 33rd Radar Conference on Radar Meteorology, Australia, August 6-10, 2007
  17. Palmer, R. D., T. Y. Yu, G. Zhang, P. B. Chilson, M. I. Biggerstaff, M. B. Yeary, S. M. Torres, J. E. Crain, and Y. Zhang, “Weather radar education at the University of Oklahoma: An integrated inter-disciplinary approach,” 33rd Radar Conference on Radar Meteorology, Australia, August 6-10, 2007
  18. Zhang, G., Q. Cao, R. J. Doviak, and D. S. Zrnic “Optimizing estimation of cross-correlation function to improve polarimetric radar measurements in the presence of noise,” IGARSS’07, Barcelona, Spain, July 23-27, 2007
  19. Zhang, G., and R. J. Doviak, “A theory for phased array weather radar to measure crossbeam wind shear and turbulence,” 23rd Conference on IIPS, AMS Annual Meeting, San Antonio, January, 2007
  20. Le, K. Le, R. D. Palmer, T. Y. Palmer, G. Zhang S. Torres, and B. Cheong, “Improving angular resolution using adaptive processing for multifunction phased array radar,” 23rd Conference on IIPS, AMS Annual Meeting, San Antonio, January, 2007
  21. Dawson, D.T., M. Xue, and G. Zhang, “High resolution simulations of the 3 May 1999 Oklahoma tornado outbreak: Impact of microphysics on cold pool intensity and storm morphology,” Severe Storms Conference, STL, 6-10 November, 2006
  22. Jung, Y., M. Xue, G. Zhang, and J. Straks, “Assimilation of simulated polarimetric radar data using ensemble Kalman filter: Observation operators and data impact,” CASA workshop, Colorado, Octocber, 2006
  23. Doviak, R. J., and G. Zhang, “Crossbeam wind measurements with phased-array Doppler weather radar, ERAD’06,Barcelona, 18-23 September, 2006
  24. Cao, Q., G. Zhang, T. Schuur, A. Ryzhkov, E. Brandes, K. Iketa, “Characterization of rain microphysics and polarimetric signatures based on disdrometer and radar observations,” IGARSS’06, Denver, 31 July – 4 August, 2006
  25. Zhang, G., and R. J. Doviak, “Weather radar interferometry to measure transverse wind, shear and turbulence,” IGARSS’06, Denver, 31 July – 4 August, 2006
  26. Brandes, E., T. J. Schuur, A. V. Ryzhkov, G. Zhang, and K. Ikeda, “Rain Microphysics Retrieval with a Polarimetric WSR-88D,” 32nd Radar Meteorology Conference, Albuquerque, New Mexico, 24-29 October, 2005
  27. Brown, W., G. Zhang, T.-Y. Yu, and S. Cohn, “A Demonstration of a Scanning Multiple Antenna UHF Radar,” 32nd Radar Meteorology Conference, Albuquerque, New Mexico, 24-29 October, 2005
  28. Kyoko Ikeda, E. Brandes, G. Zhang, and S. A. Rutledge, “Observations of Winter Storms with a 2-D Video Disdrometer and Polarimetric Radar,” 32nd Radar Meteorology Conference, Albuquerque, New Mexico, 24-29 October, 2005
  29. Kanofsky, L., P. B. Chilson, T. J. Schuur, G. Zhang, and E. A. Brandes, “A comparative study of drop size distribution retrieval using two video disdrometers and a UHF wind profiling radar,” 32nd Radar Meteorology Conference, Albuquerque, New Mexico, 24-29 October, 2005
  30. Serke, D., G. Zhang, J. Vivekanandan, T. L. Schneider, P. Minnis, and M. Poellot, “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,” 32nd Radar Meteorology Conference, Albuquerque, New Mexico, 24-29 October, 2005
  31. Yu, Y. T., G. Zhang, A. Chalamalasetti, R. J. Doviak, and D. S. Zrnic, “Improve radar resolution using range oversampling,” 32nd Radar Meteorology Conference, Albuquerque, New Mexico, 24-29 October, 2005
  32. Zhang, G., R. J. Doviak, R. Palmer, T. Y. Yu, and P. Chilson, “Bistatic Interferometry to Measure Clear Air Wind”, 32nd Radar Meteorology Conference, Albuquerque, New Mexico, 24-29 October, 2005
  33. Zhang, G., J. Dudhia, E. Brandes, W. Wang and J. Sun, “Disdrometer and Radar Observation-Based Microphysical Parameterization to Improve Weather Forecast,” 32nd Radar Meteorology Conference, Albuquerque, New Mexico, 24-29 Octiber, 2005
  34. Vivekanandan, J., G. Zhang, J. Willians and M. Politovich, “Detection of liquid droplet using ground-based polarization and dual-wavelength radar and radiometer,” EGU meeting, 2005
  35. Ikeda, K., E. Brandes, and G. Zhang, “Observations of winter storms with 2-D video disdrometer and polarimetric radar.” 11th ARAM, Hyannis, 4-8 October, 2004
  36. Zhang, G., J. Vivekanandan, and M. K. Politovich, “Radar/radiometer combination to retrieve cloud characteristics for icing detection” 11th ARAM, Hyannis, 4-8 October, 2004
  37. Brandes, E., and G. Zhang, “Raindrop size distribution: Characterization and retrieval from polarimetric radar measurements” THE 2004 JOINT ASSEMBLY, a partnership between CGU, AGU, SEG, and EEGS, Montreal, 17-21 May, 2004
  38. Doviak, R. J., G. Zhang, T. Yu, “Crossbeam wind measurements with a Phase Array Doppler Weather Radar-Theory” IEEE National Radar Conference, Philadelphia, 26-29 April, 2004
  39. Doviak, R. J., G. Zhang, S. Cohn, and W. Brown, “Comparison between Space Antenna and Doppler Beam Swing technique for wind measurement” URSI’04 National Radio Science Meeting, Boulder, 5-8 January, 2004
  40. Zhang, G., T. Yu, and R. J. Doviak, “Angular interferometry to sharpen beam” submitted to URSI’04 National Radio Science Meeting, Boulder, 5-8 January, 2004
  41. Brandes, E., G. Zhang, and J. Vivekanandan, “Drop size distribution retrieval from polarimetric radar measurements using the constrained-Gamma model: verification and application,” Proc. of the 31st Conference on Radar Meteorology, Seattle, 6-12 August, pp 29-32, 2003
  42. Ellis, S., C. William, E. Brandes, and G. Zhang, “Comparison of rain drop size distribution retrievals from polarization diversity radar and profiling radar using video disdrometer measurements,” Proc. of the 31st Conference on Radar Meteorology, Seattle, 6-12 August, pp 4-7, 2003
  43. Williams, J., J. Vivekanandan and G. Zhang, “Enhanced dual-wavelength technique for remote detection of cloud liquid water content,” Proc. of the 31st Conference on Radar Meteorology, Seattle, 6-12 August, pp 130-133, 2003
  44. “Zhang, G., J. Vivekanandan, and E. Brandes, Constrained Gamma drop size model for polarimetric radar rain estimation: justification and development,” Proc. of the 31st Conference on Radar Meteorology, Seattle, 6-12 August, pp 256-259, 2003
  45. Zhang, G., R. Doviak, J. Vivekanandan, and T. Yu, “Single-antenna interferometry to measure wind,” Proc. of the 31st Conference on Radar Meteorology, Seattle, 6-12 August, pp 740-743, 2003
  46. Politovich, M., G. Zhang, J. Vivekanandan, and J. Williams, “Characteristics of clouds containing SLD relevant to remote sensing,” AIAA meeting, April, 2003
  47. Brandes, E., G. Zhang, and J. Vivekanandan, “Precipitation estimation with polarimetric radar: Results of field studies, World Weather Research Programme’s (WWRP) International Conference on Quantitative Precipitation Forecasting (QPF),” UK, 2-6 September, 2002
  48. Brandes, E., G. Zhang, and J. Vivekanandan, “Monitoring drop-size distributions with polarimetric radar,” 11th Conference on Cloud Physics, Ogden, UT, 3-7 June, 2002
  49. Brandes, E., G. Zhang, and J. Vivekanandan, “Monitoring drop-size distributions and associated rain rates with polarimetric radar,” USWRP workshop, Boulder, 22-24 April, 2002
  50. Vivekanandan, J. and G. Zhang, “Effects of scattering due to ice particles on measurement of down-welling radiation observation of K and V-band radiometers,” 10th ARAM, Portland, OR, 13-16 May, 2002
  51. Williams, J., J. Vivekanandan, J. and G. Zhang, “Evaluation of remote icing detection techniques using X-, Ka-, and W-band radar and microwave radiometer observations,” 10th ARAM, Portland, OR, 13-16 May, 2002
  52. Zhang, G., R. Doviak, and J. Vivekanandan, “Range interferometry technique to determine radial wind,” IGARSS'02, Toronto, Canada, 23-28 June, 2002
  53. Zhang, G., J. Vivekanandan, E.A. Brandes, “The shape-slope relation in Gamma raindrop size distribution: statistical error or useful information,” USWRP workshop, Boulder, 22-24 April, 2002
  54. Brandes, E., G. Zhang, J. Vivekanandan, and S. M. Ellis, “An evaluation of polarimetric radar rainfall estimators in a semi-tropical environment,” Proc. of AMS Radar Conference, Germany, 19-24 July, pp638-640, 2001
  55. Vivekanandan, J., E., G. Zhang, and M. Politovich, “Analysis of a dual-wavelength radar technique for estimating liquid water content and droplet size,” Proc. of AMS Radar Conference, Germany, 19-24 July, pp157-159, 2001
  56. Vivekanandan, J., and G. Zhang, “Precipitation particle classification and raindrop size distribution retrieval for s-band polarimetric radar measurements,” AP-RASC'01, Tokyo, Japan, 1-4 August, pp169, 2001
  57. Vivekanandan, J. and G. Zhang, “Numerical study of multi-frequency dual-polarization microwave radiometry technique for supercooled liquid water detection,” Proc. of IGARSS'01, Sydney, Ausralia, 9-13 July, 2001
  58. Zhang, G., J. Vivekanandan, and E. Brandes, “Sampling effects on radar measurements and its consequence on parameter retrieval,” Proc. of IGARSS'01, Sydney, Ausralia, 9-13 July, 2001
  59. Zhang, G., J. Vivekanandan, and R. J. Doviak, “Innovative cross-correlation method for determining three-dimensional wind,” Proc. of AMS Radar Conference, Germany, 19-24 July, pp471-473, 2001
  60. Brandes, E., G. Zhang, J. Vivekanandan, and S. M. Ellis, “An evaluation of polarimetric radar rainfall estimators in a semi-tropical environment,” 2nd USWRP Symp., Boulder, Colorado, 27-29 March, 2000
  61. Brandes, E., G. Zhang, J. Vivekanandan, and S. M. Ellis, “A study of polarimetric radar rainfall estimators in a semi-tropical environment,” AGU 2000 Spring Meeting, 30 May - 3 June, 2000
  62. Vivekanandan, J., G. Zhang, E. Brandes and J. Miller, “Raindrop size distribution retrieval using polarimetric radar measurements,” 2nd USWRP Symp., Boulder, Colorado, 27-29 March, 2000
  63. Vivekanandan, J., G. Zhang, and M. K. Politovich, “Multi-frequency and polarization radar-based detection of liquid droplets,” 9th conference of aviation, range, and aerospace meteorology, Orlando, Florida, Sept., 2000
  64. Vivekanandan, J., G. Zhang, and M. K. Politovich, “Estimation of cloud droplet size and liquid water content using dual-wavelength radar measurememts,” Proc. Of IGARSS'00, Hawaii, 24-28 July, pp1813-1816, 2000
  65. Zhang, G., J. Vivekanandan, and E. Brandes, “A method for estimating rain rate and drop size distribution from polarimetric radar measurements,” Proc. Of IGARSS'00, Hawaii, 24-28 July, pp180-183, 2000
  66. Vivekanandan, J., G. Zhang, and M.K. Politovich, “Estimate of droplet size and liquid water content using dual-frequency radar measurements for aircraft icing detection,” Proc. of 29th ICRM, Montreal, Canada,12-16 July, pp872-875, 1999
  67. Vivekanandan, J., G. Zhang, and A.V. Ryzhkov, “Estimation of canting angle distribution of raindrop spectra using radar measurements,” International Radar Symposium, India, Dec., 1999
  68. Zhang, G., J. Vivekanandan, and M.K. Politovich, “Effect of scattering on microwave passive remote sensing of cloud liquid water content,” 8th conference of aviation, range, and aerospace meteorology, Dallas, TX, Jan., 1999
  69. Zhang, G. and J. Vivekanandan, “Microwave radiation from mixed phase cloud for ground-based radiometer remote sensing,” Proc. Of IGARSS’99, Hamburg, Germany, 28 June – 2 July, 1999
  70. Li, L., C.H. Chan, L. Tsang, and G. Zhang “Wave scattering from a lossy dielectric rough surface using PBTG BMIA/CAG and applications to passive remote sensing,” Proc. of IGARSS'98, Seattle, WA, 6-10 July, 1998
  71. Zhang, G. and L. Tsang, “Angular correlation function and scattering coefficient of electromagnetic waves scattered by a 3-D buried object under a 2-D rough surface,” Proc. of IGARSS'98, Seattle, WA, 6-10 July, 1998
  72. Pak, K., T. Tsang, and G. Zhang, “Numerical studies of electromagnetic wave scattering from two-dimensional random rough surfaces,” Proc. of PIERS'97, Hong Kong, pp464, 1997
  73. Tsang, L., K. Pak, and G. Zhang, “Application of the angular correlation function of scattered wave by a random rough surface with and without a single scattering object,” Proc. of PIERS'97, Hong Kong, pp466, 1997
  74. Zhang, G., L. Tsang, and Y. Kuga, “Application of angular correlation function of wave scattering by a random rough surface and random discrete scatterers in target detection,” Proc. of IGARSS'97, Singapore, July, 1997
  75. Zhang, G., L. Tsang, and Y. Kuga, “A study of electromagnetic wave scattering by a buried object in the presence of a random rough surface and random media using angular correlation function (ACF),” PIERS'97, Cambridge, 1997
  76. Tsang, L., G. Zhang, and K. Pak, “Numerical study of detection of a buried object under a single random rough surface with angular correlation function,” Proc. Of IGARSS'96, Lincoln, NE, pp2143- 2145, 1996
  77. Zhang, G. and L. Tsang, “Wave scattering and scene images of trees generated by Lindenmayer systems,” Proc. Of IGARSS'96, Lincoln, NE, pp728-729, 1996
  78. Chen, Z., G. Zhang, L. Tsang, And W. Au, “Collective scattering effects and applications of stochastic Lindenmayer systems in microwave remote sensing,” Proc. of PIERS'95 , Seattle, WA, 1995
  79. Tsang, L., Z. Chen, G. Zhang, and W. Au, “Microwave scattering by plants generated by a stochastic Lindenmayer system,” Proc. Of IGARSS'95, Firenze, Italy, pp1340-1343, 1995
  80. Tsang, L., K. H. Ding, G. Zhang, C. Hsu, and J. A. Kong, “Backscattering enhancement of volume-surface interaction of a layer of overlying a homogeneous dielectric half space,” Proc. Of IEEE APS/URSI/NEM'94, pp2338-2341, 1994
  81. Zhang, G. and J. Hou, “Enhanced backscattering from rough surface in turbulence,” URSI General, Japan, 1993
  82. Zhang, G., “The dependence of beam spread on observation duration,” ISAP'92, Japan, 1992
  83. Li, H., Z. Zhang, and G. Zhang, “The center of gravity for rain intensity systems and choice of orbit position of a satellite,” Proc. Of 5th URSI Commision F, France, 1.5.1-1.5.4, 1989
  84. Li, H., G. Zhang, and L. Liao, “An improved model for the prediction of rain attenuation statistics,” Proc. Of ICAP'87, U.K., pp226-229, 1987
  85. Li, H. and G. Zhang, “ Prediction of rain attenuation on earth-space path,” Proc. Of ISAP'85, Japan, pp313-316, 1985
  86. Zhang, G. and H. Li, “Analytical model for effective medium temperature and its application,” Proc. Of ISAP'85, Japan, pp293-296, 1985