Volume 37 Issue 5
Sep.  2017
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XU Da, ZHANG Guoyu, SUN Gaofei. Design of Spectral Continuous Adjustable Star Sensor's Ground Calibration Systemormalsize[J]. Journal of Space Science, 2017, 37(5): 608-615. doi: 10.11728/cjss2017.05.608
Citation: XU Da, ZHANG Guoyu, SUN Gaofei. Design of Spectral Continuous Adjustable Star Sensor's Ground Calibration Systemormalsize[J]. Journal of Space Science, 2017, 37(5): 608-615. doi: 10.11728/cjss2017.05.608

Design of Spectral Continuous Adjustable Star Sensor's Ground Calibration Systemormalsize

doi: 10.11728/cjss2017.05.608
  • Received Date: 2017-03-27
  • Rev Recd Date: 2017-06-27
  • Publish Date: 2017-09-15
  • In order to reduce the effect on calibration precision of star sensor's optical signal caused by the mismatching color temperature, a design of star sensor's ground calibration system with adjustable spectrum is presented. The spectrum range of the high-precision collimating optical system is from 500nm to 800nm, and the image quality evaluation shows that the distortion is less than 0.08% and the Modulation Transfer Function (MTF) is greater than 0.6 at 60lp·mm-1. The composition and working principle of the DMD-based light source system are described, the spectrum resolution and the simulation accuracy are analyzed, and a set of Czerny-Turner light splitting optical system which spectrum resolution is better than 2nm is designed. The test result of the star sensor's ground calibration system shows that the accuracy of the star position is better than 7", and the accuracy of the star spectrum is better than 2% as the spectrum resolution is 10nm and better than 5% as the spectrum resolution is 20nm, the calibration error caused by the mismatching color temperature is significantly reduced.

     

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