Internal Error Compensation Method Based on High-Frequency Angular Displacement for High-Resolution Optical Satellite Images

Bin, 许斌 Xu; Bin, 雷斌 Lei; Chengcheng, 范城城 Fan; Yifan, 丁一帆 Ding; Tao, 孙韬 Sun

doi:10.3788/aos201636.0928002

Cited by 1 publication

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“…Pixel spatial error is due to the spatial inhomogeneity of the detector and the error caused by the star position. Platform jittering is caused mainly by satellite orbit maneuvering, hot and cold alternation, or the periodic movement of the moving parts on the satellite (XU et al, 2016). The LFE an important type of regularity error that changes periodically with the satellite orbit and is mainly caused by field of view (FOV) spatial error and thermo elastic error.…”

Section: Error Analysismentioning

confidence: 99%

Real-Time on-Orbit Calibration of Angles Between Star Sensor and Earth Observation Camera for Optical Surveying and Mapping Satellites

Liu

Wang

Jiang

et al. 2019

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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<p><strong>Abstract.</strong> On space remote sensing stereo mapping field, the angle variation between the star sensor’s optical axis and the earth observation camera’s optical axis on-orbit affects the positioning accuracy, when optical mapping is without ground control points (GCPs). This work analyses the formation factors and elimination methods for both the star sensor’s error and the angles error between the star sensor’s optical axis and the earth observation camera’s optical axis. Based on that, to improve the low attitude stability and long calibration time necessary of current satellite cameras, a method is then proposed for real-time on-orbit calibration of the angles between star sensor’s optical axis and the earth observation camera’s optical axis based on the principle of auto-collimation. This method is experimentally verified to realize real-time on-orbit autonomous calibration of the angles between the star sensor’s optical axis and the earth observation camera’s optical axis.</p>

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Section: Error Analysismentioning

confidence: 99%