Improving the Geolocation Algorithm for Sensors Onboard the ISS: Effect of Drift Angle
AbstractThe drift angle caused by the Earth’s self-rotation may introduce rotational displacement artifact on the geolocation results of imagery acquired by an Earth observing sensor onboard the International Space Station (ISS). If uncorrected, it would cause a gradual degradation of positional accuracy from the center towards the edges of an image. One correction method to account for the drift angle effect was developed. The drift angle was calculated from the ISS state vectors and positional information of the ground nadir point of the imagery. Tests with images acquired by the International Space Station Agriculture Camera (ISSAC) using Google EarthTM as a reference indicated that applying the drift angle correction can reduce the residual geolocation error for the corner points of the ISSAC images from over 1000 to less than 500 m. The improved geolocation accuracy is well within the inherent geolocation uncertainty of up to 800 m, mainly due to imprecise knowledge of the ISS attitude and state parameters required to perform the geolocation algorithm. View Full-Text
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Dou, C.; Zhang, X.; Guo, H.; Han, C.; Liu, M. Improving the Geolocation Algorithm for Sensors Onboard the ISS: Effect of Drift Angle. Remote Sens. 2014, 6, 4647-4659.
Dou C, Zhang X, Guo H, Han C, Liu M. Improving the Geolocation Algorithm for Sensors Onboard the ISS: Effect of Drift Angle. Remote Sensing. 2014; 6(6):4647-4659.Chicago/Turabian Style
Dou, Changyong; Zhang, Xiaodong; Guo, Huadong; Han, Chunming; Liu, Ming. 2014. "Improving the Geolocation Algorithm for Sensors Onboard the ISS: Effect of Drift Angle." Remote Sens. 6, no. 6: 4647-4659.