Graduate Exam Abstract
Sounak Biswas
M.S. Final
November 17, 2017, 2:00 pm - 4:00 pm
LSC 328
Comparison of Observations from the GPM Dual-frequency Precipitation Radar and Dual-polarization S-Band Ground Radars
Abstract: The Global Precipitation
Measurement (GPM) mission Core
Observatory is equipped with a dual-
frequency precipitation radar (DPR)
operating at frequency channel of
13.6 GHz (Ku-band) and 35.5 GHz
(Ka-band). GPM-DPR’s simultaneous
observations at these two frequencies
are compared and cross validated
against measurements from different
ground based dual polarized S-band
radars located all over the USA.
Direct comparison between the space
based and ground based platform is
not possible due to difference in
observation resolution volume and
viewing geometry. In order to facilitate
comparison, in this work, a volume
matching technique has been applied
to resample the data to a common
coordinate. A methodology developed
for the GPM satellite by Schwaller
and Morris (2011) has been followed.
Comparison studies of radar
reflectivity and radar rainfall rate are
done and evaluated quantitatively.
The GPM satellite's profile
classification module’s algorithm
performance is also evaluated. Result
from Hydrometeor classification
technique by Bechini and
Chandrasekar (2015) for ground
radars has been extensively used for
validating DPR's melting layer
detection capability in precipitation
system. Also, a new algorithm
developed by Minda et al (2017) for
identification of snow falling on
ground from DPR observations has
also been considered. Ground
validation comparisons have been
performed and the results are
presented.
Adviser: Dr. V. Chandrasekar
Co-Adviser: N/A
Non-ECE Member: Prof. Paul Mielke, Statistics
Member 3: Prof. Margaret Cheney, ECE
Addional Members: N/A
Publications:
Biswas, Sounak K. and Chandrasekar, V. (2017, July) CROSS VALIDATION OF OBSERVATIONS FROM GPM DUAL-FREQUNECY PRECIPITATION RADAR WITH S-BAND GROUND RADAR MEASURENTS OVER THE DALLAS – FORT WORTH REGION - IGARSS 2017 Proceedings. Paper presented at IGARSS 2017.
M. Le, V. Chandrasekar and S. Biswas, "An Algorithm to Identify Surface Snowfall From GPM DPR Observations," in IEEE Transactions on Geoscience and Remote Sensing, vol. 55, no. 7, pp. 4059-4071, July 2017.
doi: 10.1109/TGRS.2017.2687420
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7902184&isnumber=7955031
Le, M., V. Chandrasekar, and S. Biswas, 2016: Evaluation and Validation of GPM Dual-Frequency Classification Module after Launch. J. Atmos. Oceanic Technol., 33, 2699–2716, https://doi.org/10.1175/JTECH-D-15-0253.1
Program of Study:
ECE444
ECE512
ECE546
ECE548
ECE549
ECE642
MATH676
ECE699
