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Proceedings Paper

Validation analysis after the altitude change of TRMM
Author(s): Shuji Shimizu; Nobuhiro Takahashi; Toshio Iguchi; Jun Awaka; Toshiaki Kozu; Robert Meneghini; Ken'ichi Okamoto
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Paper Abstract

The altitude of the Tropical Rainfall Measuring Mission (TRMM) satellite was raised from 350km to 402.5km in August 2001 in order to extend its lifetime. The minimum detectable value of Z-factor after the boost is 1.2dB higher. We compared the actual PR products before and after the altitude increase using statistical methods in order to verify the algorithms and the Precipitation Radar (PR) rain products after the orbit was raised, and to confirm the influence of raising the orbit on PR rain products. The reflectivity factor histograms do not exhibit any significant changes after the raising of the satellite, except for a 1.2dB increase of the minimum detectable value. The results are consistent with the estimation before the raising. The monthly global average of the conditional rain rate in 3A25 product increased 0.2 mm/h after the orbit raising. This result corresponded to the simulated rainfall average estimated from the 1C21 product before the raising. Changes in monthly global rainfall average of unconditional rain, height of rainfall and height of bright band due to the orbit raising were not significant. This result shows that the orbit change had little influence on the PR estimation.

Paper Details

Date Published: 30 April 2003
PDF: 9 pages
Proc. SPIE 4894, Microwave Remote Sensing of the Atmosphere and Environment III, (30 April 2003); doi: 10.1117/12.466523
Show Author Affiliations
Shuji Shimizu, National Space Development Agency of Japan (Japan)
Nobuhiro Takahashi, Communications Research Lab. (Japan)
Toshio Iguchi, Communications Research Lab. (Japan)
Jun Awaka, Hokkaido Tokai Univ. (Japan)
Toshiaki Kozu, Shimane Univ. (Japan)
Robert Meneghini, NASA Goddard Space Flight Ctr. (United States)
Ken'ichi Okamoto, Osaka Prefecture Univ. (Japan)


Published in SPIE Proceedings Vol. 4894:
Microwave Remote Sensing of the Atmosphere and Environment III
Christian D. Kummerow; JingShang Jiang; Seiho Uratuka, Editor(s)

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