Transactions of Nanjing University of Aeronautics & Astronautics
Impact Analysis of Solar Irradiance Change on Precision Orbit Determination of Navigation Satellites
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Abstract:
Solar radiation pressure is the main driving force and error source for precision orbit determination of navigation satellites. It is proportional to the solar irradiance, which is the “sun constant”. In regular calculation, the “solar constant” is regard as a constant. However, due to the existence of sunspots, flares, etc., the solar constant is not fixed, the change in the year is about 1%. To investigate the variation of solar irradiance, we use interpolation and average segment modeling of total solar irradiance data of SORCE, establishing variance solar radiation pressure (VARSRP) model and average solar radiation pressure (AVESRP) model based on the built solar pressure model (SRPM) (constant model). According to observation data of global positioning system (GPS) and Beidou system (BDS) in 2015 and comparing the solar pressure acceleration of VARSRP, AVESRP and SRPM, the magnitude of change can reach Keywords:
Project Supported:
Clc Number:
P228
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