Huai-feng LI, Zhi LI, Qin LIN. Optical system design and stray light suppression for medium-high orbit autonomous navigation system based on stellar refraction[J]. Optics and precision engineering, 2017, 25(8): 1995-2003.
DOI:
Huai-feng LI, Zhi LI, Qin LIN. Optical system design and stray light suppression for medium-high orbit autonomous navigation system based on stellar refraction[J]. Optics and precision engineering, 2017, 25(8): 1995-2003. DOI: 10.3788/OPE.20172508.1995.
Optical system design and stray light suppression for medium-high orbit autonomous navigation system based on stellar refraction
In order to realize full-time-running and high-precision stellar refraction autonomous navigation of medium-high orbit satellites based on single star sensor with wide field of view
and to fix the suppression problem of strong stray light lead by illuminated earth in field of view
an internally occulting stellar refraction sensor and its stray light suppression were researched. Through the establishment of the model of stellar refraction sensor and the simulation test environment of stellar refraction navigation
the intensities of stray light for each level were determined by simulation analysis and numerical calculation
thus presenting the scheme for stray light suppression accordingly. The simulation results show that the internally occulting stellar refraction sensor with re-imaging optical system can suppress the stray light to the acceptable maximum capacity of the autonomous navigation system. The acceptable maximum capacity of stray light suppression is 1.1×10
-3
in the field of 1.003
R
e
(
R
e
is the earth radius)
which means that the stray light in the field of 1.003
R
e
should be suppressed under 1.1×10
-3
of the average luminance value of the illuminated earth. Moreover
an field experiment for observing the stars with the moon in the field of view by the prototype of the stellar refraction sensor were performed. The results show that the methods for the stray light suppression and the intensity calculation of the stray light are effective and feasible
which lay a good foundation for the application of the stellar refraction autonomous navigation method for medium-high orbit satellites based on single star sensor with wide field of view.
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references
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