Volume 38 Issue 4
Jul.  2018
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XU Da, ZHANG Guoyu, SUN Gaofei. Design of Star Simulator with Spatial Background Lightormalsize[J]. Journal of Space Science, 2018, 38(4): 575-582. doi: 10.11728/cjss2018.04.575
Citation: XU Da, ZHANG Guoyu, SUN Gaofei. Design of Star Simulator with Spatial Background Lightormalsize[J]. Journal of Space Science, 2018, 38(4): 575-582. doi: 10.11728/cjss2018.04.575

Design of Star Simulator with Spatial Background Lightormalsize

doi: 10.11728/cjss2018.04.575
  • Received Date: 2017-02-21
  • Rev Recd Date: 2018-01-10
  • Publish Date: 2018-07-15
  • In order to satisfy the high precision calibration requirement of the star sensor's optical signal, a star sensor ground calibration system with spatial background light is proposed. It solves the problem of calibration accuracy of the star sensor's optical signal due to the spatial background light, improves the accuracy of star sensor calibration. The influence of spatial background light on the calibration accuracy of star sensor is analyzed. The scheme of star simulator with spatial background light is given. A set of star simulator optical system which can simulate spatial background light and star point position at the same time is designed. The results show that the system distortion is smaller than 0.1%, MTF is larger than 0.5 with 80lp·mm-1. The system satisfies the high-precision requirements. A set of spatial background light system is designed through the control of the current and the variable iris. The background brightness adjustment is up to 26 times. Finally, a method of correct star point position with aberration compensation is proposed, and the correction model is presented. The star position error and spatial background brightness of the star simulator are tested by using the Leica T6100 theodolite and the illuminometer. The result shows that the spatial background brightness adjustment is up to 26 times and the star position accuracy is better than 10". The star simulator can meet the ground calibration requirement of star sensor.

     

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