Research on Precise Ephemeris Design Method for the LEO Satellites Navigation Augmentation System
Abstract Based on the analysis of the orbit characteristics of more than ten low-orbit satellites, such as GRACE and SWARM, we analyze the sampling interval and interpolation methods of the precise ephemeris for the low-orbit satellites. We design two precise ephemeris schemes: efficiency first and precision first, according to the user’s requirement. The experimental results show that the orbit height of low-orbit satellites has a significant influence on the sampling interval and interpolation methods. In view of the accuracy requirements of 3 cm and 10 cm orbits, the storage space occupied by ephemeris files can be compressed by more than 99% through reasonable orbit design.
Key words :
LEO satellites
navigation augmentation
precise ephemeris
ephemeris design
ephemeris interpolation
Cite this article:
GUO Xueli,WANG Lei. Research on Precise Ephemeris Design Method for the LEO Satellites Navigation Augmentation System[J]. jgg, 2021, 41(8): 800-805.
GUO Xueli,WANG Lei. Research on Precise Ephemeris Design Method for the LEO Satellites Navigation Augmentation System[J]. jgg, 2021, 41(8): 800-805.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2021/V41/I8/800
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