Title :
NASA D3R linear depolarization ratio observations and a new estimation technique
Author :
Robert M. Beauchamp;V. Chandrasekar;Manuel Vega
Author_Institution :
Colorado State University, Fort Collins, CO
fDate :
7/1/2015 12:00:00 AM
Abstract :
The polarimetric radar parameter, linear depolarization ratio (LDR), provides microphysical insight into a scattering volume, particularly for mixed-phase and ice particles. A new estimator for improved estimation of LDR is presented. The NASA dual-frequency, dual-polarization, Doppler radar (D3R), which was recently upgraded to support operational linear depolarization ratio observations, was used as a testbed for evaluation of the new estimator. With D3R´s Ku-band observations, the new LDR estimator is compared to conventional estimators and it is demonstrated that the new estimator is insensitive to attenuation, a number of radar system biases, and has increased immunity to noise for low SNR observations.
Keywords :
"Radar","Attenuation","Signal to noise ratio","Antennas","Rain","Mathematical model","NASA"
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2015 IEEE International
Electronic_ISBN :
2153-7003
DOI :
10.1109/IGARSS.2015.7325909