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High-Precision Angle Prediction of Sun for Space Remote Sensing Instrument
- Source :
- International Journal of Aerospace Engineering, Vol 2021 (2021)
- Publication Year :
- 2021
- Publisher :
- Wiley, 2021.
-
Abstract
- In order to grasp the timing of sun calibration in advance, this paper introduces a high-precision method to predict the solar angle by using the current broadcast time and orbital instantaneous root of the satellite platform. By calculating the sun’s apparent right ascension and apparent declination, the conversion matrix from the geocentric inertial coordinate system to the orbital coordinate system, and the satellite attitude correction matrix, the sun vector in the satellite body coordinate system is obtained. This method is used to predict the sun angle of a sun synchronous orbit in the satellite coordinate system, and the prediction results are compared with the STK simulation results. The results show that the sun angle prediction error of this method is less than ±0.003°. It can meet the requirements of on-orbit solar calibration. The main error sources in the prediction method are analysed.
- Subjects :
- Motor vehicles. Aeronautics. Astronautics
TL1-4050
Subjects
Details
- Language :
- English
- ISSN :
- 16875966 and 16875974
- Volume :
- 2021
- Database :
- Directory of Open Access Journals
- Journal :
- International Journal of Aerospace Engineering
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.69fb5876a18749d2a4c2df3fa10295ad
- Document Type :
- article
- Full Text :
- https://doi.org/10.1155/2021/8733478