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Research on Satellite Autonomous Orbit Determination Method Based on the Unscented Particle Filter with Embedded Earth Sensor Correction

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Executive Summary

The direct earth horizon and starlight observation with earth sensor and star sensor is often used in the satellite autonomous orbit determination, which is a stable autonomous navigation method but with some defects that need to be improved. On the one hand, both the orbit state equation and measure equation are nonlinear, in which only the 2nd zonal harmonic of the non-spherical earth gravity is introduced while the other perturbation terms are regarded as white noise, which in fact all these terms have certain models themselves that are usually non-Gaussian distribution.

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