Optical Correlator for Star Identification and Tracking
| Autor: | Yang Jiankun, Li Xiujian, Fan Qing-chun, Jia Hui, Hao Yuncai, Hu Wenhua, Yang Jun-cai |
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| Rok vydání: | 2009 |
| Předmět: |
Pixel
Spacecraft business.industry Computer science media_common.quotation_subject Optical computing Astrophysics::Cosmology and Extragalactic Astrophysics Star tracker Star catalogue Refresh rate Robustness (computer science) Sky Optical correlator Astrophysics::Solar and Stellar Astrophysics Computer vision Astrophysics::Earth and Planetary Astrophysics Artificial intelligence business Astrophysics::Galaxy Astrophysics media_common |
| Zdroj: | Lecture Notes in Computer Science ISBN: 9783642104411 OSC |
| DOI: | 10.1007/978-3-642-10442-8_19 |
| Popis: | Star tracker is one of the most important spacecraft attitude sensors which can achieve accuracies within several arc-seconds utilizing star identification and star tracking. The refresh rate and accuracy of star tracker are constrained as there are so many stars in the sky. A novel star identification and tracking method for star tracker using optical correlator is proposed to solve this problem of star map comparing and identification. The proposed optical correlator can optically execute the correlation operation between current star map and the standard star map constructed from the star catalog. The whole sky star identification can be completed within 100ms due to the inherent parallel computing ability of optical correlator. Star map motion can be tracking with an accuracy of up to 1/100 pixel. Computer simulations and experiments indicate that this method has great robustness to small signal-to-noise ratio, and improve the performance of star tracker remarkably. |
| Databáze: | OpenAIRE |
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