In order to obtain the better radiometric performance,spaceborne synthetic aperture interferometric radiometer measures the inter-elements phase based on phase calibration test on-ground,the result can be used to compensate the inter-element phase in the brightness temperature inversion.redundant space calibration takes advantage of the redundant baseline information of interferometric array,this technology assesses inter-elements phase without extra resource and take for an on-orbit verification scheme.This paper systematically introduces the manner of redundant space calibration based on scene observed by spaceborne synthetic aperture interferometric radiometer and proposes a correction method with a phase of simulated flat target response for flat target scene,this method can retravel inter-elements phase in point source scene and flat target scene,combined with simulation to verify feasibilities.
关键词
星载综合孔径微波辐射计/冗余空间定标/相位定标
Key words
spaceborne synthetic aperture interferometric radiometer/redundant space calibration/phase calibration
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