临近空间地球外部扰动引力误差影响分析  

Analysis of the impact of Earth External Disturbing Gravity Errors in Near-space

作　　者：范瑾煜 赵祥鸿 董斌 王许 FAN Jinyu;ZHAO Xianghong;DONG Bin;WANG Xu(Naval Research Institute,Tianjin 300061,China;Safty Asessmet Support of Naval Staf Department,Beijing 100071,China)

机构地区：[1]海军研究院,天津300061 [2]海军参谋部安全评估保障室,北京100071

出　　处：《海洋测绘》2024年第5期1-4,共4页Hydrographic Surveying and Charting

基　　金：国家自然科学基金(42274015,42174013)。

摘　　要：距离地面20~200 km的临近凭借空间地理和环境优势,已成为备受瞩目的新空间资源。地球外部扰动引力是临近空间飞行器导航制导与控制不可或缺的基础信息,地球扰动引力误差已成为临近空间飞行器导航定位精度的主要影响因素之一。基于地面重力场对临近空间地球扰动引力的截断误差和传播误差影响建立数学模型,定量分析了临近空间地球扰动引力误差影响,仿真实验结果表明,为使得临近空间地球扰动引力的精度达到1 mGal,地面重力数据的格网分辨率应优于2′,同时,为了抑制截断误差和传播误差对临近空间地球扰动引力的影响,应尽可能提升地面重力数据的格网分辨率和精度水平。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.

关 键 词：地球外部扰动引力 临近空间 截断误差影响 传播误差影响 空间分辨率 

分 类 号：P223[天文地球—大地测量学与测量工程]