| Autor: |
魏新国 Wei Xin-guo, 徐佳 Xu Jia, 张广军 Zhang Guang-jun |
| Rok vydání: |
2013 |
| Předmět: |
|
| Zdroj: |
Optics and Precision Engineering. 21:849-857 |
| ISSN: |
1004-924X |
| DOI: |
10.3788/ope.20132104.0849 |
| Popis: |
As the S-curve errors are important parts of centroid location errors for star sensors,this paper explored the sources of S-curve errors combining with the physical process of centroid location and a simulation.The specific effect of each error source was analyzed and an analytical expression of S-curve errors was calculated by a frequency domain method.The experiments using a star sensor were performed and the S-curve error in the center of the Field of View(FOV) was collected and was compensated using a sine model.The compensation effects on the S-curve errors in the whole FOV were analyzed by the same compensation model and the calibration data were also compensated.Experimental results show that the standard deviation of S-curve error is 0.048 pixels in the center of the FOV,and 0.027 pixels after compensation,therefore the precision of centroid location is improved by 43.8%.Furthermore,after compensating with the same sine model in the center of the FOV for whole field-curve errors,the precision of centroid location in the whole FOV is improved by 35.7% at least and the precision of calibration is improved by 31.7%.It concludes that the S-curve errors are important errors of star sensors and they can be significantly compensated by using the sine model. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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