[仿真]SMOS Calibration

Abstract—The calibration of the Soil Moisture and Ocean :NJb<%$  
Salinity (SMOS) payload instrument, known as Microwave 3Gi#WV4$  
Imaging Radiometer by Aperture Synthesis (MIRAS), is based D%k%kg0,  
on characterization measurements which are performed initially un|
+YqLf  
on-ground prior to launch and, subsequently, in-flight. A good VD+TJ` r  
calibration is a prerequisite to ensure the quality of the geophysical TNBFb_F  
data. The calibration scheme encompasses both the spaceborne \(Z'@5vC  
instrument and the ground data processing. Once the system has ]CyWL6z  
been calibrated, the instrument performance can be verified, and n1K"VjZk  
the higher level geophysical variables, soil moisture and ocean s>d@=P>R  
salinity, can be validated. In this paper, the overall calibration ,lSt}Lml  
approach is presented, focusing on the main aspects relevant to the |T7 < !  
SMOS instrument design and mission requirements. The distributed cy|]}n85  
instrument, comprising 72 receivers, leads to a distributed gaBt;@?:Q  
internal calibration approach supported by specific external calibration -;=0dfC(  
measurements. The relationship between the calibration _YzItge*  
data and the routine ground processing is summarized, demonstrating HHu|X`tc  
the inherent link between them. Finally, the approach to FyYD7E  
the in-flight commissioning activities is discussed. N@J "~9T  
Index T .. }.O,P'k  
HN,E+dQ  

未注册仅能浏览部分内容，查看全部内容及附件请先 登录 或 注册