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Possibility of Rainfall Rate Estimation Using ZDR Alone Measured by a Ku-band Dual-polarization Radar with Simultaneous Reception
水平・垂直両偏波同時受信可能なKuバンド2偏波レーダにより観測されたZDRのみから降雨強度を推定する手法について

Yuji Ohsaki, Kenji Nakamura
1997 Journal of the Meteorological Society of Japan  
The Communications Research Laboratory (CRL) has developed a simultaneous reception Ku-band dual-polarization radar.  ...  of a CRL's dual-polarization radar.  ...  In this study, K at 20C is used. aH(D) and ov(D) are theoretically calculated at 14.3625GHz (Ku-band) of CRL's dualpolarization radar frequency (Oguchi, 1977) .  ... 
doi:10.2151/jmsj1965.75.1_95 fatcat:65nj6nia7jgapm7m3rq3qfesw4

Rain Observation by an X- and Ka-band Dual-Wavelength Radar
X-,Ka-バンド2周波レーダによる降雨の観測

Kenji Nakamura, Hideyuki Inomata, Toshiaki Kozu, Jun Awaka, Ken'ichi Okamoto
1990 Journal of the Meteorological Society of Japan  
Simultaneous rain observations by C-and Ku-band radars were also performed.  ...  A rain observation by an X-and Ka-band dual-wavelength radar has been performed. The objective of this experiment is to explore the possibility of multi-wavelength radar for measuring rainfall rate.  ...  Unfortunately, the radar-measured Z-factor has a large variation even at the same rainfall rate due to raindrop size distribution variations, because the Z-factor is proportional to the sixth power of  ... 
doi:10.2151/jmsj1965.68.5_509 fatcat:iqcva2ikfvdk5cofrx6jplhk3i

Overview of the D3R Observations during the IFloodS Field Experiment with Emphasis on Rainfall Mapping and Microphysics

Robert M. Beauchamp, V. Chandrasekar, Haonan Chen, Manuel Vega
2015 Journal of Hydrometeorology  
An overview of the D3R's calibration and observations is presented. A method for attenuation correction of Ka-band observations using Ku-band results is introduced.  ...  Dual-frequency ratio estimates in stratiform rain and ice are presented and compared with theoretical values.  ...  The authors acknowledge the support of the GPM program, David Wolff and David Marks for NPOL support, and Mathew Schwaller and Walter Petersen for deployment and logistics support.  ... 
doi:10.1175/jhm-d-15-0023.1 fatcat:qmntpgrvxnfmhfs4jogds5y3ba

A Study on the Feasibility of Dual-Wavelength Radar for Identification of Hydrometeor Phases

Liang Liao, Robert Meneghini
2011 Journal of Applied Meteorology and Climatology  
and Ka bands, and the radar reflectivity factor at Ku band Z Ku for different hydrometeor types.  ...  size distribution.  ...  Eastwood Im and Dr. Simone Tanelli of the NASA Jet Propulsion Laboratory for providing the APR-2 radar data and the processing software. This work is supported by Dr. R.  ... 
doi:10.1175/2010jamc2499.1 fatcat:wux4yntssnhrjn6ij22gokkod4

Deployment and Performance of an X-Band Dual-Polarization Radar during the Southern China Monsoon Rainfall Experiment

Zhao Shi, Haonan Chen, Venkatachalam Chandrasekar, Jianxin He
2017 Atmosphere  
The differential phase-based attenuation correction and radar calibration using self-consistency of dual-polarization observables are presented.  ...  This article utilizes the drop size distribution (DSD) data captured during SCMREX to derive the polarimetric observables with the T-matrix method at the X-band frequency [16] , and regresses the nonlinear  ...  We want to acknowledge Guangdong Meteorological Bureau and Chinese Academy of Meteorological Sciences for providing respectively rain gauge data and raindrop spectra data used in this study.  ... 
doi:10.3390/atmos9010004 fatcat:7zps6e3vsjcjxocbqick2q6sty

POTENTIAL ROLE OF DUAL-POLARIZATION RADAR IN THE VALIDATION OF SATELLITE PRECIPITATION MEASUREMENTS

V. Chandrasekar, Arthur Hou, Eric Smith, V. N. Bringi, S. A. Rutledge, E. Gorgucci, W. A. Petersen, Gail Skofronick Jackson
2008 Bulletin of The American Meteorological Society - (BAMS)  
With the success of the TRMM and the plans for TRMM's successor mission, the Global Precipitation Measurement mission (GPM), the current era represents T R M M s a t e ll it e .  ...  When combined with comprehensive ground validation and calibration, satellite observations offer practical prospects for acquiring accurate and global datasets especially over oceans and remote regions  ...  The GPM mission concept is centered on the deployment of a Core Observatory satellite with an active dual-frequency (Ka/Ku band) precipitation radar and a passive GPM Microwave Imager (GMI) with wideband  ... 
doi:10.1175/2008bams2177.1 fatcat:idquw3btrbgz3cvszbofgiu4zy

The application of S-band polarimetric radar measurements to Ka-band attenuation prediction

J.D. Beaver, V.N. Bringi
1997 Proceedings of the IEEE  
In order to gain more understanding about the physical processes that are responsible for Ka-band attenuation, the Colorado State University CHILL S-band polarimetric radar is used to take radar measurements  ...  The ACTS satellite employs two one at 20.185 GHz and another at 27.505 GHz.  ...  Pattison, and B. Bowie of the CSU-CHILL staff in data collection and by Dr. E. Mueller and D. Brunkow, who spearheaded the radar modifications to a two-transmitter/two-receiver system.  ... 
doi:10.1109/5.598412 fatcat:pch6rjgsnvgrlmxyryhapqmxoi

Cross-Validation of Observations between the GPM Dual-Frequency Precipitation Radar and Ground Based Dual-Polarization Radars

Sounak Biswas, V. Chandrasekar
2018 Remote Sensing  
Analysis shows that DPR Ku- and Ka-Band reflectivities are well matched with ground radar with correlation coefficient as high as 0.9 for Ku-band and 0.85 for Ka-band.  ...  The Global Precipitation Measurement (GPM) mission Core Observatory is equipped with a dual-frequency precipitation radar (DPR) with capability of measuring precipitation simultaneously at frequencies  ...  Acknowledgments: The authors acknowledge the data sources from the GPM program and the NOAA for the ground radar. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/rs10111773 fatcat:uoij7ovlazglzjstqhwonn32na

Retrieval of Attenuation Profiles from the GPM Dual-frequency Radar Observations

Takahisa KOBAYASHI, Mitsuharu NOMURA, Ahoro ADACHI, Soichiro SUGIMOTO, Nobuhiro TAKAHASHI, Hiromaru HIRAKUCHI
2021 Journal of the Meteorological Society of Japan  
This pre-publication manuscript may be downloaded, distributed and used under the provisions of the Creative Commons Attribution 4.0 International (CC BY 4.0) license.  ...  The authors appreciate two anonymous reviewers for useful and detailed comments.  ...  Acknowledgments This work is partially supported by Japan Aerospace Exploration Agency Precipitation Measuring Mission research program.  ... 
doi:10.2151/jmsj.2021-030 fatcat:md7cvyq5uvhnln6xf4kvq3fkve

Using Microwave Backhaul Links to Optimize the Performance of Algorithms for Rainfall Estimation and Attenuation Correction

Silke Trömel, Michael Ziegert, Alexander V. Ryzhkov, Christian Chwala, Clemens Simmer
2014 Journal of Atmospheric and Oceanic Technology  
The variability in raindrop size distributions and attenuation effects are the two major sources of uncertainty in radar-based quantitative precipitation estimation (QPE) even when dual-polarization radars  ...  It is demonstrated that the factor a can be optimized using microwave links at Ku band oriented along radar radials with an accuracy of about 20%-30%.  ...  We also acknowledge partial support by the SFB TR32 (Transregional Collaborative Research Centre 32), funded by the DFG (German Research Foundation) for Michael Ziegert and cooperation with NOAA's NSSL  ... 
doi:10.1175/jtech-d-14-00016.1 fatcat:pwiukbl7pzfcdapsfsgzxxccuy

Evaluation of X-Band Dual Polarization Radar-Rainfall Estimates from OLYMPEX

Yagmur Derin, Emmanouil Anagnostou, Marios Anagnostou, John Kalogiros
2019 Journal of Hydrometeorology  
Observations from locally deployed dual-polarization X-band radar have the advantage of providing multiparameter measurements near ground that carry significant information useful for estimating drop size  ...  corrections, and rain microphysics estimation by SCOP-ME, an algorithm that uses optimal parameterization and best-fitted functions of specific attenuation coefficients and DSD parameters with radar polarimetric  ...  This work was supported by the Eversource Energy Center at the University of Connecticut.  ... 
doi:10.1175/jhm-d-19-0097.1 fatcat:snriyniojrg6dids5ilfsaa3bi

Investigating precipitation microphysics using ground-based microwave remote sensors and disdrometer data

Frank S. Marzano, Domenico Cimini, Mario Montopoli
2010 Atmospheric research  
In this respect, disdrometer surface measurements can help in exploring the raindrop size distribution.  ...  By exploiting this remote and in-situ instrumentation, estimates of precipitation optical thickness, liquid, ice and melted hydrometeor category, and their size distribution can be obtained.  ...  Radiometric measurements were supplied by Radiometrics Inc. (Boulder, USA).  ... 
doi:10.1016/j.atmosres.2010.03.019 fatcat:6qximwnfhzgbbpghvuvkckmdym

Simulating Radar Observations of Precipitation at Higher Frequencies from Lower-Frequency Polarimetric Measurements

Jason Fritz, V. Chandrasekar
2012 Journal of Atmospheric and Oceanic Technology  
As the target frequency of simulations for weather radar increase to X band and above, the size of large raindrops and hail either approach or exceed the radar wavelength, resulting in a radar cross section  ...  With the advent of dual-polarization systems, a more complete characterization of the effect of precipitation on radar is possible in order to improve model effectiveness.  ...  This research was supported by NASA through the Precipitation Measurement Missions (PMM) program and the Earth and Space Science Fellowship (NESSF) graduate program.  ... 
doi:10.1175/jtech-d-11-00157.1 fatcat:zerexanimzdzxh3f2yexht3b7e

Validation of TRMM Precipitation Radar through Comparison of Its Multiyear Measurements with Ground-Based Radar

Liang Liao, Robert Meneghini
2009 Journal of Applied Meteorology and Climatology  
Through comparisons with the well-calibrated, non-attenuated WSR at Melbourne, Florida for the period 1998-2007, the calibration of the Precipitation Radar (PR) aboard the TRMM satellite is checked using  ...  A procedure to accurately resample spaceborne and ground-based radar data is described, and then applied to the measurements taken from the Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar  ...  at S and Ku bands.  ... 
doi:10.1175/2008jamc1974.1 fatcat:l7fs2jnrifbhtlumb7tq6hd6mi

Utilization of a C-band Polarimetric Radar for Severe Rainfall Event Analysis in Complex Terrain over Eastern China

Yabin Gou, Yingzhao Ma, Haonan Chen, Jiapeng Yin
2018 Remote Sensing  
(iii) The rainstorm is mainly dominated by small-sized and moderate-sized raindrops, with the mean volume diameter being less than 2 mm, but its KDP column (KDP > 3°·km−1) has a liquid water content that  ...  Two radar quantitative precipitation estimation (QPE) frameworks, one based on a radar-gauge feedback mechanism and the other based on standard rain drop size distribution (DSD)-derived rainfall retrieval  ...  A Bayesian Approach for Integrated Raindrop Size Distribution (DSD) Retrieval on an X-Band Dual-Polarization Radar Network. J. Atmos. Ocean. Technol. 2016, 33, 377–389. [CrossRef] 24.  ... 
doi:10.3390/rs11010022 fatcat:nmjd6qb3vzbgnn5rzodh6bayoq
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