Simulation-Based Performance Evaluation of Adaptive Scan for Spaceborne Rain Radar

Toyoshi SHIMOMAI  Yusuke YOKOYAMA  Tosihiaki KOZU  Hiroshi HANADO  

IEICE TRANSACTIONS on Communications   Vol.E91-B   No.6   pp.2020-2024
Publication Date: 2008/06/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.6.2020
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Sensing
spaceborne rain radar,  TRMM,  adaptive antenna scan,  

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The performance of the adaptive scan for spaceborne rain radar, which uses a quick scan for rain search followed by a normal or concentrated scan only for rainy areas, are studied through a simulation using TRMM (Tropical Rainfall Measuring Mission) Precipitation Radar (PR) data. Trade-off studies are performed to find an optimum quick-scan and rain search method to minimize rain missing and false alarm of rain area. Using the optimum method thus determined, consecutive 8-day TRMM PR data are used to statistically evaluate the performance of the adaptive scan in terms of sensitivity improvement and power consumption saving. It is shown that more than 3-dB improvement in effective signal-to-noise ratio (SNe) can be achieved for 40% of the total observations. Alternatively, about 26% power saving can be achieved if the SNe is kept the same.