Look Angle Correction for SMAP L-Band Radiometer Using Geolocation Measurements

被引：0
|
作者：
Le Vine, David. M. [1 ]
Dinnat, Emmanuel P. [1 ]
de Matthaeis, Paolo [2 ,3 ,4 ]
Peng, Jinzheng [1 ]
机构：
[1] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[2] NASA, Goddard Space Flight Ctr, Cryospher Sci Lab, Greenbelt, MD 20771 USA
[3] Univ Maryland Baltimore, Baltimore, MD 21250 USA
[4] Morgan State Univ, Baltimore, MD 21251 USA
来源：
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2024年 / 62卷
关键词：
Antennas; Geology; Coastlines; Antenna measurements; Vectors; Temperature measurement; Azimuth; Geolocation; microwave radiometer; remote sensing; SOIL;
D O I：
10.1109/TGRS.2024.3405811
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：
Geolocation of the radiometer footprint in scanning instruments such as SMAP (Soil Moisture Active Passive) has been successfully demonstrated using the change in antenna temperature as the radiometer scans across land/water boundaries (coastlines). This measurement provides the distance of the footprint from the nominal coastline, but it does not provide information about the error in look angle and azimuth of the antenna boresight vector needed to correct the geolocation error. A method for doing this is reported using fore and aft crossings of the boundary. The approach is demonstrated using the SMAP radiometer simulator and then applied to SMAP data over the west coast of Madagascar. The error estimates of 0.3 degrees for the look angle and 0.15 degrees for azimuth are consistent with independent estimates.
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页码：1 / 11
页数：11
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