Paper Info
Title
Simulation of EarthCARE Spaceborne Doppler Radar Products Using Ground-Based and Airborne Data: Effects of Aliasing and Nonuniform Beam-Filling
Abstract
This paper describes the expected performance of the Doppler cloud profiling radar being built for the Earth Cloud Aerosols Radiation Explorer (EarthCARE) mission of the Japanese Aerospace Exploration Agency and the European Space Agency. Spaceborne Doppler radar data are simulated starting from high-resolution Doppler measurements provided by ground-based and airborne Doppler radars, ranging from nonconvective to moderately convective scenarios. The method hinges upon spatial and spectral resampling to consider the specificities of the spaceborne configuration. An error analysis of the resulting Doppler product is conducted to address aliasing and nonuniform beam-filling (NUBF) problems. A perturbation analysis is applied to explore the latter problem and allow for a self-standing systematic correction of NUBF using merely the received reflectivity factor and mean Doppler velocities as measured by the instrument. The results of our simulations show that, at a horizontal integration of 1 km, after proper de-aliasing and NUBF correction, the radar will typically yield a velocity accuracy in the order of 1.3 m·s-1 over intertropical regions where the pulse-repetition frequency (PRF)=6.1 kHz, of 0.8 m·s-1 where the cloud-profiling radar (CPR) operates at PRF=7 kHz, and, of 0.7 m·s-1 over high latitudes where the CPR of EarthCARE will operate at PRF=7.5 kHz.
Year
DOI
Venue
2014
10.1109/TGRS.2013.2251639
Geoscience and Remote Sensing, IEEE Transactions  
Keywords
Field
DocType
Doppler radar,aerosols,atmospheric techniques,clouds,error analysis,meteorological radar,perturbation theory,Doppler cloud profiling radar,Earth Cloud Aerosols Radiation Explorer mission,EarthCARE spaceborne Doppler radar products,airborne data,aliasing,error analysis,ground-based data,mean Doppler velocities,nonuniform beam-filling,perturbation analysis,pulse-repetition frequency,reflectivity factor,self-standing systematic correction,spaceborne configuration,spatial resampling,spectral resampling,Aliasing,cloud-profiling radar (CPR),nonuniform beam-filling (NUBF),spaceborne Doppler radar
Pulse-Doppler radar,Radar,Radar engineering details,Continuous-wave radar,Doppler radar,Radar imaging,Early-warning radar,Remote sensing,Doppler effect,Mathematics
Journal
Volume
Issue
ISSN
52
2
0196-2892
Citations 
PageRank 
References 
3
0.67
2
Authors
4
Name
Order
Citations
PageRank
Sy, O.O.174.19
Simone Tanelli26722.02
Takahashi, N.361.97
Ohno, Y.431.69