Aquarius L-band Radiometers Calibration Using Cold Sky Observations

被引：16

作者：

Dinnat, Emmanuel P. ^{[1
,2
]}

Le Vine, David M. ^{[2
]}

Piepmeier, Jeffrey R. ^{[3
]}

Brown, Shannon T. ^{[4
]}

Hong, Liang ^{[5
]}

机构：

[1] Chapman Univ, CEESMO, Orange, CA 92866 USA

[2] NASA, Goddard Space Flight Ctr, Cryospher Sci Lab, Greenbelt, MD 20771 USA

[3] NASA, Goddard Space Flight Ctr, Instrument Syst & Technol Div, Greenbelt, MD 20771 USA

[4] CALTECH, Jet Prop Lab, NASA, Microwave Syst, 4800 Oak Grove Dr, Pasadena, CA 91109 USA

[5] NASA, Goddard Space Flight Ctr, SAIC, Greenbelt, MD 20771 USA

来源：

IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING | 2015年 / 8卷 / 12期

基金：

美国国家航空航天局;

关键词：

Antenna gain; antenna radiation patterns; calibration; microwave radiometry; sea measurements; SOIL-MOISTURE; SALINITY; PARAMETERS; EMISSION; IMPACT;

D O I：

10.1109/JSTARS.2015.2496362

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

An important element in the calibration plan for the Aquarius radiometers is to look at the cold sky. This involves rotating the satellite 180 degrees from its nominal Earth viewing configuration to point the main beams at the celestial sky. At L-band, the cold sky provides a stable, well-characterized scene to be used as a calibration reference. This paper describes the cold sky calibration for Aquarius and how it is used as part of the absolute calibration. Cold sky observations helped establish the radiometer bias, by correcting for an error in the spillover lobe of the antenna pattern, and monitor the long-term radiometer drift.

引用

页码：5433 / 5449

页数：17

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