Optimizing σ0 Information From the Jason-2 Altimeter

被引：27
|
作者：
Quartly, Graham D. [1 ]
机构：
[1] Natl Oceanog Ctr, Southampton SO14 3ZH, Hants, England
来源：
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS | 2009年 / 6卷 / 03期
关键词：
Altimeter; data quality; Jason-2; reprocessing; retracking; sigma0; PRECIPITATION;
D O I：
10.1109/LGRS.2009.2013973
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
A radar altimeter's normalized backscatter, sigma(0), is used in many oceanographic applications to infer values of wind speed, wind stress, rain rate, and the presence of biogenic slicks. The waveform retracker used to estimate the key geophysical variables for the altimeters on the Jason-1 and Jason-2 satellites shows increased small-scale variability since the problem is ill-conditioned. A simple empirical' adjustment to sigma(0) improves the separability between various parameters and also improves the along-track profiles of sigma(0). This leads to the following: 1) more realistic wind fields; 2) better discrimination of rain events; and 3) improved comparison between the Jason-1 and Jason-2 altimeters during their tandem mission.
引用
收藏
页码：398 / 402
页数：5
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