AltiKa Radiometer: Instrument Description and In-Flight Performance

被引：6
|
作者：
Steunou, N. [1 ]
Picot, N. [1 ]
Sengenes, P. [1 ]
Noubel, J. [1 ]
Frery, M. L. [2 ]
机构：
[1] Ctr Natl Etud Spatiales, F-31401 Toulouse 4, France
[2] Collecte Localisat Satellites, Toulouse, France
来源：
MARINE GEODESY | 2015年 / 38卷
关键词：
Microwave radiometer; tropospheric correction; sensitivity; gain; MICROWAVE RADIOMETER; CALIBRATION;
D O I：
10.1080/01490419.2015.1006381
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：
On 25 February 2013, the Satellite for Argos and AltiKa (SARAL) was launched from the Indian Sriharikota launch site. The AltiKa payload consisted of an altimeter and a radiometer. This paper describes the AltiKa radiometer. This instrument has been studied for several years by CNES, TAS-F, ASTRIUM-F and a set of science laboratories, and AltiKa is the first compact instrument embedding simultaneously the altimeter and radiometer functions. AltiKa radiometer is a dual frequency instrument working in K (23.8GHz) and Ka band (37GHz), it is based on the total power principle, with direct detection receivers. On-ground acceptance tests exhibited a very high level of performance: less than 0.2dB has been estimated for both sensitivity and absolute accuracy in both frequencies. This paper focuses on the in-flight performances that have been observed since the launch. All the instrument observable characterizations are nominal, and in-flight sensitivity has been estimated lower than 0.2K.
引用
收藏
页码：43 / 61
页数：19
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