Analysis of the impact of Earth External Disturbing Gravity Errors in Near-space
The near-space region located 20 to 200 kilometers above the Earth's surface has become a focal point for new spatial resources due to its geographical and environmental advantages.The external disturbing gravity of the Earth is an indispensable foundational information for the navigation,guidance,and control of near-space vehicles.Errors in Earth's disturbing gravity have become one of the main factors affecting the precision of navigation and positioning for near-space vehicles.Based on mathematical models for the truncation error impact and propagation error impact of the ground gravity field on the Earth's disturbing gravity in near-space.A quantitative analysis of the error impact of the Earth's disturbing gravity in near-space is conducted.To achieve a precision of 1 mGal in the Earth's disturbing in near-space,the grid resolution of ground gravity data should be better than 2′,and to mitigate the impact of truncation and propagation errors in near-space Earth's disturbing gravity data,it is recommended to improve the spatial resolution and precision level of ground-based gravitational data as much as possible.
external disturbing gravity of the Earthnear-spacetruncation error impactpropagation error impactspatial resolution
万方数据
维普
