Qing Cao, Ph.D.

 

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350 David L. Boren Blvd, Suite 1780, Norman, Oklahoma 73072

Email: qingcao@eecradar.com

RESEARCH INTERESTS:

  • Radar meteorology, weather radar polarimetry
  • Radar/Antenna system
  • Satellite remote sensing
  • Signal processing and spectrum analysis
  • Cloud and precipitation microphysics
  • Precipitation measurements and estimation;
  • Wave propagation and electromagnetic scattering

EDUCATION:

  • Ph.D., Electrical & Computer Engineering, University of Oklahoma, Norman, Oklahoma, USA, 2009

Dissertation: Observational study of rain microphysics and rain retrieval using polarimetric radar data.

  • M.S., Electrical Engineering, Wuhan University, Wuhan, Hubei, China, 2005

Thesis: Analysis of Radiation and Scattering Characteristics for the Antenna Array of High-Frequency Ground Wave Radar.

  • B.S., Electrical Engineering, Wuhan University, Wuhan, Hubei, China, 1997

 PROFESSIONAL EXPERIENCE:

  • 2013–present, Research Scientist, Enterprise Electronics Corporation, Norman, Oklahoma, USA
  • 2010–2013, Research Associate,Advanced Radar Research Center (ARRC, was Atmospheric Radar Research Center prior to August 2012), University of Oklahoma, Norman, Oklahoma, USA
  • 2011–2013, Research Associate, Hydrometeorology and Remote Sensing Laboratory (HyDROS), University of Oklahoma, Norman, Oklahoma, USA
  • 2010, Postdoctoral Researcher, Atmospheric Radar Research Center (ARRC), University of Oklahoma, Norman, Oklahoma, USA
  • 2006–2009, Graduate Research Assistant, Atmospheric Radar Research Center (ARRC), University of Oklahoma, Norman, Oklahoma, USA
  • 2005, Visiting Scholar, School of Meteorology (SoM), University of Oklahoma, Norman, Oklahoma, USA
  • 2002–2005, Graduate Research Assistant, Radio Wave Propagation Laboratory, Wuhan University, Wuhan, Hubei, China
  • 1997–2002, Telecom Engineer, Wuhan Telecom Company of China Telecom Corporation, Wuhan, Hubei, China

PROFESSIONAL MEMBERSHIPS:

  • 2007-present, Member, Institute of Electrical and Electronics Engineers (IEEE)
  • 2007-present, Member, American Meteorological Society (AMS)
  • 2013-present, Member, American Geophysical Union (AGU)
  • 2012-present, Member, International Association of Chinese Youth in Water Sciences (CYWater)
  • 2011-2012, Full Member, Sigma Xi, The Scientific Research Society

Editorial/Review Activities:

  • Since 2012, Editorial Board, Dataset Papers in Geosciences, Datasets International
  • Since 2013, Editorial Board, American Journal of Remote Sensing, Science Publishing Group
  • Since 2008, Reviewer for 14 international Journals (46 manuscripts), including IEEE Transactions on Geoscience and Remote Sensing, Journal of Applied Meteorology and Climatology, Journal of Atmospheric Science, Journal of Geophysical Research-Atmospheres, Journal of Atmospheric and Oceanic Technology, Quarterly Journal of the Royal Meteorological Society, Atmospheric Research, Advances in Atmospheric Sciences, IEEE Antenna and Propagation Magazine, Journal of Electromagnetic Waves and Applications/ Progress In Electromagnetics Research, Environmental Engineering and Management Journal, Progress in Physical Geography, American Journal of Remote Sensing

 

OTHER ACTIVITIES:

  • 2012.10-2015.12, Guest Professor, School of Atmospheric Science, Nanjing University of Information Science & Technology, Nanjing, China
  • Fall 2012, Guest Instructor (three lectures), Radar Hydrology (CEES5020), OU
  • 21 May–31 July 2012, Mentor (Student: Veronica Fall), National Weather Center (NWC) Research Experience for Undergraduate (REU) program, OU
  • Spring 2012, Guest Instructor (one lecture), Remote Sensing of Hydrology, OU
  • 2012–present, Group Leader, QPE research group, HyDROS, OU
  • 2012.12, Coordinator, CYWater 2012 Town Hall Meeting, San Francisco, CA

 

RESEARCH GRANTS:

  • Co-PI, 利用TRMM卫星和CINRAD观测提高地面雷达定量降水估计能力. “Improving ground radar-based quantitative precipitation estimation using TRMM and CINRAD”. National Natural Science Foundation (NSF) of China (No. 41205025), Jan. 2013 – Dec. 2015, ¥260,000, China, funded
  • Co-I, “Using NMQ Ground-Based Radar to Improve Passive-Only Precipitation Profile Retrievals for PATH”, NASA, NNH13ZDA001N-WEATHER, March 2014-Feb. 2017, $325,648, funded
  • Co-I, “A Research Framework to Bridge GPM Core and Constellation Sensors using polarimetric National Mosaic QPE (NMQ)”. NASA, ROSES2012: NNH12ZDA001N-PMM, Mar. 2013 – Feb. 2016, $419,190, funded.
  • Co-PI, “Improved Snow Detection and Estimation through Incorporating NASA Spaceborne Measurements into Polarimetric National Mosaic QPE System (NMQ-Q3)”, NASA, NNH13ZDA001N-NDOA, March 2014-Feb. 2016, $341,246, pending
  • Co-I, “Development and Evaluation of Active and Passive Microwave Combined Global Daily Soil Moisture Retrieval Algorithms”, NASA, NNH13ZDA001N-TERAQ, March 2014-Feb. 2017, $716,687, pending
  • Travel Award: “Linking NASA Multiple Satellite Missions with Oklahoma Ground Observations: Impact of Land Surface Soil Moisture on Cloud Structure and Precipitation”. Source of support: Oklahoma NASA Space Grant Consortium/NASA EPSCoR, $2,310

 

WORK PROJECTS:

  • 2012–present, Investigator, project of “Incorporating NASA Spaceborne Precipitation Research Products into National Mosaic QPE Real-time System for Improved Short-term Weather Prediction at Colorado Basin River Forecast Center”, funded by NASA grants No. NNX11AL78G.
  • 2010-2011, Investigator, project of “Advanced Study of Precipitation Microphysics with Multi-Frequency Polarimetric Radar Observations and Data Assimilation”, funded by the U.S. National Science Foundation (NSF) Grant AGS-1046171
  • 2010–2011, Investigator, project of “Spectrum-time estimation and processing (STEP) for weather radar signals”, funded by Enterprise Electronics Corporation (EEC) & WSI Corporation.
  • 2008–2009, Student Investigator, project of “Survey and Assessment of Relevant Radar Technologies”, funded by Enterprise Electronics Corporation (EEC) & WSI Corporation.
  • 2006–2009, Student Investigator, field experiments in Oklahoma (Norman, Oklahoma City, Chickasha, Thunderbird lake, Kessler field farm laboratory): Rain microphysics study using disdrometers, profiler, and polarimetric S-, C- and X-band radars
  • 2006–2009, Student Investigator, project of “Improving Microphysics Parameterizations and Quantitative Precipitation Forecast through Optimal Use of Video Disdrometer, Profiler and Polarimetric Radar Observations”, fund by the U.S. National Science Foundation (NSF) Grant ATM-0608168.
  • 2006, Student Investigator, field experiment of transmitter calibration and antenna pattern measurement of NSSL’s National Weather Radar Testbed (NWRT): Phased Array Radar, funded by the NOAA MPAR project.
  • 2003–2005, Student Investigator, project of “Ocean state measuring by high-frequency ground wave radar”, funded by Chinese National High-Tech Research and Development Program (863 Program) Grant 2001AA631050.
  • 2002, Engineer, Project of office computer network installation and testing of Wuhan Telecom Company, funded by Wuhan Telecom Company, China
  • 2000–2002, Engineer, Projects of Lucent 5ESS telephone switching system hardware installation, testing and maintenance, funded by Wuhan Telecom Company, China
  • 1997–1999, Engineer, Projects of wireless base transceiver station (BTS) hardware installation, testing and maintenance for three mobile systems: Motorola TACS, Italtel GSM and Ericsson GSM, funded by Wuhan Telecom Company, China

 

JOURNAL PUBLICATIONS:

  1. Q. Cao, Y. Hong, S. Chen, J.J. Gourley, J. Zhang, and P.E. Kirstetter, 2013: How Much Do They Agree? The First Cross-Investigation of NASA CloudSat 2C-SNOW-PROFILE Product and National Multi-sensor Mosaic QPE (NMQ) Snowfall Data. Geophysical Research Letters, submitted for peer-review.
  2. S. Chen, Y. Hong, Q. Cao, Y. Huang, L. Qiao, Z. Li, and S. Khan, 2013: Evaluation of the version-7 TRMM precipitation analysis during July 21 Beijing extreme heavy rainfall event using dense rain gauge observations. Water Research, submitted for peer-review.
  3. Q. Cao, Y. Hong, Y. Wen, J.J. Gourley, and P. Kirstetter, 2013: Enhancing Quantitative Precipitation Estimation (QPE) over Continental United States (CONUS) using a Physically-based Multi-sensor Integration Approach. IEEE Geoscience and Remote Sensing Letters, submitted for the 2nd round peer-review
  4. Z. Zhong, Q. Cao, and W. Huang, 2013: Research and Application of Virtual Frequency Hopping in High-frequency Ground Wave Radar, The Scientific World Journal, submitted for peer-review.
  5. Q. Cao, and Y. Qi, 2013: The Variability of Vertical Structure of Precipitation in Huaihe River Basin of China: Implications from Long-Term Spaceborne Observations with TRMM Precipitation Radar, Water Resources Research, submitted for peer-review.
  6. Z. Li, D. Yang, Y. Hong, Y. Qi, and Q. Cao, 2013: First development and evaluation of radar based precipitation estimates in Three Gorges Region with complex terrain, Journal of Hydrology, submitted for peer-review.
  7. Q. Cao, Y. Hong, Y. Qi, Y. Wen, J. Zhang, J. Gourley, and L. Liao, 2013: Empirical Conversion of Vertical Profile of Reflectivity (VPR) from Ku-band to S-band Frequency, Journal of Geophysical Research, vol.118, 1-12, DOI: 10.1002/jgrd.50138.
  8. Q. Cao, Y. Hong, J.J. Gourley, Y. Qi, J. Zhang, Y. Wen, and P. Kirstetter, 2012: Statistical and Physical Analysis of Vertical Structure of Precipitation in Mountainous West Region of US using 11+ Year Spaceborne TRMM PR Observations, Journal of Applied Meteorology and Climatology, in press, doi: http://dx.doi.org/10.1175/JAMC-D-12-095.1
  9. Q. Cao, G. Zhang, and M. Xue, 2013: A Variational Approach for Retrieving Raindrop Size Distribution from Polarimetric Radar Measurements in the Presence of Attenuation. Journal of Applied Meteorology and Climatology, vol. 52, no.1, pp. 169-185, doi: http://dx.doi.org /10.1175/JAMC-D-12-0101.1.
  10. Q. Cao, M. Yeary, and G. Zhang, 2012: Efficient Ways to Learn Weather Radar Polarimetry. IEEE Transactions on Education, vol. 55, no. 1, 58-68 (2012), DOI: 10.1109/TE.2011.2118211.
  11. Q. Cao, G. Zhang, R.D. Palmer, and L. Lei, 2012: Detection and Mitigation of Second Trip Echo in Polarimetric Weather Radar Measurements. IEEE Transactions on Geoscience and Remote Sensing, vol. 50, no. 4 1240 – 1253 (2012), DOI: 10.1109/TGRS.2011.2164927.
  12. Q. Cao, G. Zhang, R.D. Palmer, M. Knight, R. May, and R. Stafford, 2012: Spectrum-Time Estimation and Processing (STEP) for Improving Weather Radar Data Quality. IEEE Transactions on Geoscience and Remote Sensing, doi: 10.1109/TGRS.2012.2190608
  13. Q. Cao, G. Zhang, E. Brandes, and T. Schuur, 2010: Polarimetric Radar Rain Estimation through Retrieval of Drop Size Distribution Using a Bayesian Approach. Journal of Applied Meteorology and Climatology, volume 49, pages 973–990 (2010).
  14. Q. Cao, and G.  Zhang, 2009: Errors in Estimating Raindrop Size Distribution Parameters Employing Disdrometer and Simulated Raindrop Spectra. Journal of Applied Meteorology and Climatology, volume 48, pages 406–425 (2009).
  15. Q. Cao, G. Zhang, E. Brandes, T. Schuur, A. Ryzhkov, and K. Ikeda, 2008: Analysis of Video Disdrometer and Polarimetric Radar Data to Characterize Rain Microphysics in Oklahoma. Journal of Applied Meteorology and Climatology, volume 47, pages 2238–2255 (2008).
  16. Q. Cao, H. Gao, and Z. Yang, 2005: Pre-estimating Array RCS of HF Ground Wave Radar. Journal of Wuhan University (Natural Sciences Edition) (China), issue 51, volume 3, pages 379-383 (2005).
  17. Q. Cao, and Z. Zhong, 2005: New method for source number estimation in radar spectrum evaluation, Modern Radar (China), issue 27, volume 8, pages 49-54 (2005).
  18. V. Fall, Q. Cao, and Y. Hong, 2013: Intercomparison of Vertical Structure of Storms Revealed by Ground-Based (NMQ) and Spaceborne Radars (CloudSat-CPR and TRMM-PR), The Scientific World Journal, accepted, in press.
  19. Y. Wen, Q. Cao, P. Kirstetter, Y. Hong, J.J. Gourley, J. Zhang, G. Zhang, and B. Yong, 2012: Incorporating NASA space-borne radar data into NOAA National Mosaic QPE system for improved precipitation measurement: a physically based VPR identification and enhancement method. Journal of Hydrometeorology, in press. doi: http://dx.doi.org/10.1175/JHM-D-12-0106.1
  20. S. Chen, Y. Hong, Q. Cao, J. J. Gourley, Y. Tian, J. Hardy, P. Kirstetter, B. Yong, and Y. Shen, 2013: Similarity and Difference of the two Successive V6 and V7 TRMM Multi-satellite Precipitation Analysis Performance over China. Journal of Geophysical Research, accepted, in press.
  21. Y. Qi, J. Zhang, Q. Cao, Y. Hong, and X. Hu, 2013: Correction of Radar QPE Errors for Non-Uniform VPRs in Mesoscale Convective Systems Using TRMM Observations, Journal of Hydrometeorology, in press, doi: http://dx.doi.org/10.1175/JHM-D-12-0165.1
  22. S. Chen, Y. Hong, Q. Cao, J. Zhang, K. Howward, J.J. Gourley, P. Kirstetter, Y. Qi, J. Hu, and J. Wang, 2012: Performance Evaluation of Radar and Satellite Rainfall Products for Typhoon Morakot Over Taiwan: Are Remote-sensing Rainfall Retrieval Algorithms Ready for Gauge Denial Scenario of Extreme Events? Journal of Hydrology, in press, http://dx.doi.org/10.1016/j.jhydrol.2012.12.026.
  23. G. Zhang, M. Xue, Q. Cao, and D. Dawson, 2008: Diagnosing the Intercept Parameter for Exponential Raindrop Size Distribution Based on Video Disdrometer Observations: Model Development. Journal of Applied Meteorology and Climatology, volume 47, pages 2983–2992 (2008).
  24. Y. Qi, J. Zhang, P. Zhang, and Q. Cao, 2013: VPR Correction of Bright Band Effects in Radar QPEs Using Dual Polarimetric Radar Observations, Journal of Geophysical Research, 118, doi:10.1002/jgrd.50364.
  25. S. Chen, Y. Hong, J.J. Gourley, G. J. Huffman, Y. Tian, Q. Cao, P. Kirstetter, J. Hu, J. Hardy, S. Khan, X. Xue, and B. Yong, 2012: Evaluation of the Successive V6 and V7 TRMM Multi-satellite Precipitation Analysis Over the Continental United States. Water Resources Research, accepted, in press.
  26. S. Chen, P. Kirstetter, Y. Hong, J.J. Gourley, Y. Tian, Y. Qi, Q. Cao, J. Zhang, K. Howard, J. Hu, and X. Xue, 2013: Evaluation of Spatial Errors of Precipitation Rates and Types from NASA/JAXA Space-borne Radar over the Southern CONUS, Journal of Hydrometeorology, in press, doi: http://dx.doi.org/10.1175/JHM-D-13-027.1.
  27. Y. Li, G. Zhang, R.J. Doviak, L. Lei, and Q. Cao, 2013: A new approach to detect ground clutter mixed with weather signals. IEEE Transactions on Geoscience and Remote Sensing, vol.51, no.4, pp.2373-2387, doi: 10.1109/TGRS.2012.2209658
  28. Lei, L., G. Zhang, R.J. Doviak, R. Palmer, B. Cheong, M. Xue, Q. Cao, and Y. Li, 2012: Multilag Correlation Estimators for Polarimetric Radar Measurements in the Presence of Noise. J. Atmos. Oceanic Technol., 29, 772–795.
  29. G. Zhang, S. Luchs, A. Ryzhkov, M. Xue, L. Ryzhkova, and Q. Cao, 2011: Winter Precipitation Microphysics Characterized by Polarimetric Radar and Video Disdrometer Observations in Central Oklahoma. Journal of Applied Meteorology and Climatology, 50, 1558–1570 (2011).
  30. Y. Wen, Y. Hong, G. Zhang, T. Schuur, J. Gourley, Z. Flamig, K. Morris, and Q. Cao, 2011: Cross Validation of Spaceborne Radar and Ground Polarimetric Radar Aided by Polarimetric Echo Classification of Hydrometeor Types. Journal of Applied Meteorology and Climatology, 50, 1389–1402 (2011).
  31. R.D. Palmer, D. Bodine, M. Kumjian, B. Cheong, G. Zhang, Q. Cao, H. Bluestein, A. Ryzhkov, T. Yu, and Y. Wang, 2011: The May 10, 2010 tornado outbreak in central Oklahoma: potential for new science with high-resolution polarimetric radar. Bulletin of the American Meteorological Society, 92, 871–891 (2011).

 

BOOK CHAPTER:

  1. Q. Cao, and G. Zhang, Chapter 13: Radar Polarimetry for Rain Estimation. Multi-scale Hydrological Remote Sensing: Perspectives and Applications, CRC Press (Taylor and Frances Group), 2012, pages 303-334.
  2. P. Kirstetter, Y. Hong, J.J. Gourley, Q. Cao, M. Schwaller, and W. Petersen: A research framework to bridge from the Global Precipitation Measurement mission core satellite to the constellation sensors using ground radar-based National Mosaic QPE.
AGU books, Chapman monograph on remote sensing, 2013, accepted and in press.

 

SCIENTIFIC REPORTS:

  1. Q. Cao, and Y. Hong, 2012: Annual Report for NASA grants No. NNX11AL78G Project “Incorporating NASA spaceborne precipitation research products into National Mosaic QPE operational system for improved short-term weather prediction at Colorado Basin River Forecast Center”, submitted to NASA/NSSC, May 2012.
  2. Q. Cao, G. Zhang, and R. Palmer, 2011: Spectrum-Time Estimation and Processing (STEP) Algorithm for Improving Weather Radar Data Quality, OU/ARRC report, submitted to Enterprise Electronics Corporation (EEC), July 2011.
  3. Q. Cao, G. Zhang, and R. Palmer, 2010: Code Description of Multi-lag Processing Algorithm (MLAG) with Delivery Code for STEP Phase One, OU/ARRC report, submitted to Enterprise Electronics Corporation (EEC), August 2010.
  4. G. Zhang, R. Palmer, and Q. Cao, 2008: Survey and Assessment of Relevant Radar Technologies. OU/ARRC report, submitted to Enterprise Electronics Corporation (EEC), December 2008.

 

CONFERENCE PUBLICATIONS/PRESENTATIONS:

  1. Q. Cao, Y. Hong, S. Chen, J.J. Gourley, J. Zhang, and P. Kirstetter 2013: Detectability of Falling Snow with NASA CloudSat Satellite: Evaluation from NOAA/NSSL Ground-Radar-Based National Multi-sensor Mosaic QPE (NMQ) System. AMS, 36th Conference on radar meteorology, Breckenridge, CO, September 16 – 20, 2013
  2. P.B. Chilson, Y. Hong, Q. Cao, W. A. Petersen, and J.F. Kelly, 2013: Detection of Biological Scatter Using Spaceborne Precipitation Radar: A Feasibility Study. AMS, 36th Conference on radar meteorology, Breckenridge, CO, September 16 – 20, 2013
  3. S. Chen, Y. Hong, Q. Cao, J.J. Gourley, Z. Flamig, J. Zhang, and K. Howard, 2013: Cross-validation of Precipitation Identification from NOAA/NSSL Ground-Radar-Based National Mosaic QPE (NMQ) System and Crowd-Sourcing-Based mPING Weather Reports. AMS, 36th Conference on radar meteorology., Breckenridge, CO, September 16 – 20, 2013
  4. Y. Wen, Y. Hong, Q. Cao, G. Zhang, J. J. Gourley, J. Zhang, Z. Flamig, and P. Kirstetter, 2013: Systematical Evaluation of VPR-Identification and Enhancement (VPR-IE) Approach: Incorporate Space-borne Radar into Ground Radar Network. AMS, 36th Conference on radar meteorology, Breckenridge, CO, September 16 – 20, 2013
  5. P. Kirstetter, J.J. Gourley, Y. Hong, and Q. Cao, 2013: Microphysical characteristics of heavy, Mediterranean rainfall retrieved from polarimetric radar measurements during the Hymex field campaign. AMS, 36th Conference on radar meteorology, Breckenridge, CO, September 16 – 20, 2013
  6. Y. Wen, Y. Hong, Q. Cao, G. Zhang, J.J. Gourley, J. Zhang, P. Kirstetter, Z. Flamig, and X. Xue, 2013: Capture extreme precipitation events in Mountainous Region: incorporate space-borne radar into ground radar network using VPR-IE method. The 2nd China-U.S. Symposium on Meteorology, Qingdao, China, June 25-27, 2013.
  7. Q. Cao, Y. Hong, G. Zhang, J.J. Gourley, P. Kirstetter, J. Zhang, A. Ryzhkov, and T. L’Ecuyer, 2013: Icing-related hazardous weather revealed by CloudSat and NMQ system: Potential for enhancing the hydrometeor classification in sub-freezing region. AMS 93rd Annual Meeting, Austin, TX, 6-10 January 2013
  8. Q. Cao, Y. Hong, Y. Wen, J.J. Gourley, Y. Qi, J. Zhang, and P. Kirstetter, 2012: How Spaceborne Radar Helps Ground Radar in Precipitation Estimation: Real-time Incorporation of TRMM PR into NOAA NMQ System. AGU, Fall Meeting, San Francisco, CA, December 3-7, 2012
  9. Y. Wen, Y. Hong, Q. Cao, J.J. Gourley, J. Zhang, and P. Kirstetter. 2012: VPR-IE: Combining climatological VPR information from TRMM Precipitation Radar with NEXRAD-based rainfall estimates. AGU, Fall Meeting, San Francisco, CA, December 3-7, 2012
  10. P. Kirstetter, Y. Hong, J.J. Gourley, Q. Cao, M. Schwaller, W.A. Petersen, J. Zhang, E.N. Anagnostou, V. Maggioni, H. Seyyedi, and S. Chen, 2012: Toward A Research Framework to Bridge Cross-platform Error Characterization of Spaceborne Passive/Active Sensors using NOAA/NSSL Ground Radar-based National Mosaic QPE Products over CONUS.
AGU, Fall Meeting, San Francisco, CA, December 3-7, 2012
  11. Y. Qi, J. Zhang, Y. Hong, Q. Cao, X. Hu, and J.J. Gourley, 2012: Correction of Radar QPE Errors for Non-Uniform VPRs in Mesoscale Convective Systems Using TRMM Observations. Proceeding of the 7th European Conference on radar in Meteorology and Hydrology (ERAD 2012), Toulouse, France, 25-29 June (2012).
  12. Q. Cao, G. Zhang, R. Palmer, R. May, R. Stafford, and M. Knight, 2011: Spectrum-Time Estimation and Processing (STEP) Algorithm for Improving Weather Radar Data Quality. Proceeding of AMS 35th Conference on radar meteorology., Pittsburgh, PA, 26–30 September (2011).
  13. Q. Cao, G. Zhang, R. Palmer, and L. Lei, 2011: A New Identification and Mitigation Algorithm for Second Trip Contamination. Proceeding of 2011 IEEE Radar Conference, pp. 729 – 733, Kansas City, KS, 23–27 May 2011, doi: 10.1109/RADAR.2011.5960634 (2011).
  14. Q. Cao, G. Zhang, R.D. Palmer, and Y. Li, 2011: Evaluation of the spectrum clutter identification algorithm with C-band polarimetric radar OU-PRIME. 2nd International Symposium on Earth-Science Challenges (ISEC), Norman, OK, September 14-16 (2011).
  15. Y. Wen, Y. Hong, Q. Cao, J. Zhang, J.J. Gourley, G. Zhang, and K. Howard, 2011: Improving precipitation estimation in mountainous west region of United States by incorporating space‐borne radar measurements into National Mosaic QPE system, NASA PMM Annual Meeting, November 7-10, 2011, Denver, CO (2011)
  16. Q. Cao, G. Zhang, and R. Palmer, 2010: Real-time Implementation of Enhanced Moment Estimation on the C-band Polarimetric Research Radar OU-PRIME. Proceeding of the 6th European Conference on radar in Meteorology and Hydrology (ERAD 2010), Sibiu, Romania, September 6-10 (2010).
  17. G. Zhang, Q. Cao and P. Bukovcic, 2010: Precipitation particle size distributions characterized by video disdrometer and polarimetric radar measurements. AMS, 13th Conference on Cloud Physics, Portland, OR, June 28 – July 2 (2010).
  18. P. Bukovcic, D. Zrnic, G. Zhang, and Q. Cao, 2010: Retrieval and application of raindrop size distributions from polarimetric radar data. USNC-URSI, National Radio Science Meeting, Boulder, CO, January 6–9, (2010)
  19. Q. Cao, and G. Zhang, 2010: Issues in variational retrieval of raindrop size distribution from polarimetric radar data. USNC-URSI, National Radio Science Meeting, Boulder, CO, January 6–9 (2010).
  20. L. Lei, G. Zhang, R. Palmer, B. Cheong, M. Xue, and Q. Cao, 2009: A multi-lag correlation estimator for polarimetric radar variables in the presence of noise. Proceeding of the 34th AMS Conference on radar meteorology. Williamsburg, VA, October 5–9 (2009).
  21. P. Bukovcic, D. Zrnic, G. Zhang, and Q. Cao, 2009: Spatial structure and time evolution of rain drop size distributions revealed from disdrometer and polarimetric radar observations. Proceeding of the 34th AMS Conference on radar meteorology. Williamsburg, VA, October 5–9 (2009).
  22. Q. Cao, G. Zhang, and M. Xue, 2009: Variational retrieval of raindrop size distribution from polarimetric radar data in presence of attenuation. Proceeding of the 89th AMS Annual Meeting, 25th Conference on Interactive Information Processing Systems (IIPS). Phoenix, AZ, January 11–15 (2009)
  23. P. Bukovcic, D. Zrnic, G. Zhang, and Q. Cao, 2009: A study of precipitation microphysics using S- and X- band polarimetric radar measurements. Proceeding of the 89th AMS Annual Meeting, IOAS-AOLS. Phoenix, AZ, January 11–15 (2009).
  24. Q. Cao, G. Zhang, R. Palmer, B. Cheong, and L. Lei, 2009: Enhanced moment estimation of OU-PRIME through advanced signal processing. AMS, 34th Conference on radar meteorology., Williamsburg, VA., October 5–9 (2009).
  25. S. Luchs, G. Zhang, A. Ryzhkov, M. Xue, L. Ryzhkova, and Q. Cao, 2009: Observations of snow particle size distribution with 2-D video disdrometer and polarimetric radar. Proceeding of the 89th AMS Annual Meeting, IOAS-AOLS. Phoenix, AZ, Jan. 11–15, 2009.
  26. Q. Cao, and G. Zhang, 2008: A Bayesian Approach to Retrieve Raindrop Size Distribution from Polarimetric Radar Data. Proceeding of the 88th AMS Annual Meeting, 24th Conference on Interactive Information Processing Systems (IIPS). New Orleans, LA, Jan. 20–24, 2008.
  27. G. Zhang, R. Doviak, C. Curtis and Q. Cao, 2008: Multi-patterns Measurements for Calibration and Sidelobe Reduction on the National Weather Radar Testbed. Proceeding of the 88th AMS Annual Meeting, Symposium on Recent Developments in Atmospheric Applications of Radar and Lidar, New Orleans, LA, January 20–24 (2008).
  28. G. Zhang, 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, 2008: A Field Experiment to Study Rain Microphysics Using Video Disdrometers, Profiler, and Polarimetric S- and X-Band Radars. Proceeding of the 88th AMS Annual Meeting. New Orleans, LA, Jan. 20–24 (2008).
  29. M. Morris, P. Chilson, A. Ryzhkov, T. Schuur, M. Teshiba, G. Zhang, Q. Cao, R. Palmer, and L. Kanofsky, 2008: An Inter-Comparison of Raindrop Size Distributions Retrieved from Polarimetric Radar Parameters. Proceeding of the 88th AMS Annual Meeting, New Orleans, LA, January 20–24 (2008).
  30. G. Zhang, M. Xue, Q. Cao, and D. Dawson, 2007: Diagnosing the intercept parameter for exponential raindrop size distribution based on video disdrometer observations. Proceeding of 22nd Conf. on Weather Analysis & Forecasting, AMS, Salt Lake City, UT, Jun. 25–29 2007
  31. P. Chilson, G. Zhang, T. Schuur, L. Kanofsky, M. Teshiba, Q. Cao, and M. Every, 2007: Coordinated in-situ and remote sensing precipitation measurements at the Kessler Farm Field Laboratory in Central Oklahoma, Proceedings of the 33rd Conference on Radar Meteorology, AMS, Cairns, Australia, August 6–10 (2007).
  32. L. Kanofsky, P. Chilson, T. Schuur, G. Zhang, Q. Cao, and E. Brandes, 2007: Quantitative precipitation estimation and error analysis with a UHF wind profiling radar and a two-dimensional video disdrometer, Proceedings of the AMS 33rd Conference on Radar Meteorology, Cairns, Australia, August 6–10 (2007).
  33. Q. Cao, G. Zhang, T. Schuur, A. Ryzhkov, E. Brandes, and K. Ikeda, 2006: Characterization of Rain Microphysics based on Disdrometer and Polarimetric Radar Observations, Proceeding of IGARSS 2006. pp. 523-528, doi: 10.1109/IGARSS.2006.139 (2006).
  34. Z. Zhong, B. Wen, Q. Cao, R. Wu, and N. Peng, 2005: Research of a Linear Array Self-Calibration for HF Ground Wave Radar. Proceeding of the 8th IASTED International Conference on Intelligent Systems and Control, pp. 167-171, Cambridge, MA (2005).