Radiometric Performance of the SMOS Reference Radiometers-Assessment After One Year of Operation

被引：19

作者：

Kainulainen, Juha ^{[1
]}

Colliander, Andreas ^{[2
]}

Closa, Josep ^{[3
]}

Martin-Neira, Manuel ^{[4
]}

Oliva, Roger ^{[5
]}

Buenadicha, Guillermo ^{[5
]}

Rubiales Alcaine, Pilar ^{[3
]}

Hakkarainen, Anssi ^{[1
]}

Hallikainen, Martti T. ^{[1
]}

机构：

[1] Aalto Univ, Sch Elect Engn, Dept Radio Sci & Engn, Aalto 00076, Finland

[2] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[3] EADS CASA Espacio, Madrid 28022, Spain

[4] European Space Agcy, European Space Res & Technol Ctr, NL-2200 AG Noordwijk, Netherlands

[5] European Space Agcy, European Space Astron Ctr, Villanueva De La Canada 28692, Spain

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2012年 / 50卷 / 05期

基金：

芬兰科学院; 美国国家航空航天局;

关键词：

Calibration; radiometry; remote sensing; stability; synthetic aperture imaging; BRIGHTNESS TEMPERATURE; CALIBRATION; NOISE; SENSITIVITY; SPACE;

D O I：

10.1109/TGRS.2011.2177273

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：

In this paper, we present an analysis of the radiometric performance of the three 1.4-GHz noise injection radiometers of the European Space Agency's Soil Moisture and Ocean Salinity (SMOS) satellite. The units measure the antenna temperature, which contributes to the average brightness temperature level of SMOS retrievals. We assess the radiometric resolution of the receivers, the similarity between their measurements, and their thermal stability. For these purposes, we use SMOS measurement data gathered during the first year of the orbital operations of the satellite, which was launched in November 2009. The main results from the analysis are that the units meet the design requirements with a margin. Also, we present a new thermal model for the radiometers to further enhance their stability.

引用

页码：1367 / 1383

页数：17

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