TITLE:
The Satellite’s On-Orbit Attitude System Error Compensation Technique Based on Stereo Models
AUTHORS:
Yu Zhou, Xin Hu, Peng Du, Yi Wang
KEYWORDS:
Attitude Measuring System, Low Frequency Error, Dynamic Calibration, Relative Orientation
JOURNAL NAME:
Journal of Computer and Communications,
Vol.8 No.6,
June
30,
2020
ABSTRACT: According to the problem that the low measurement accuracy of TH-1 satellite star sensor, the low frequency and “slow drift” error which cannot be ignored in the attitude determination system, resulting in obvious random error in the horizontal position and elevation direction, and the change of the error with time and latitude, cannot be calibrated by the ground field of the real problem. In this paper, a low frequency detection model is established by using the principle of relative orientation, and the low frequency error is obtained by parallax elimination. Finally, the satellite attitude is compensated and the more accurate exterior orientation elements are obtained, thus improving the positioning accuracy and stability. The experimental results show that: the proposed methods are feasible, and by using the model to dynamically calibrate the exterior orientation angle elements on orbit, the plane and elevation errors of the ground points can be basically eliminated. The global uncontrollable positioning accuracy and stability of the photogrammetry satellite are improved.