Determining the external disturbing gravity field by applying gravity disturbance as boundary value condition

被引：0
|
作者：
Tian J. [1 ,2 ]
Li X. [1 ,3 ]
Liu X. [4 ,5 ,6 ]
Feng J. [1 ]
Fan D. [1 ]
机构：
[1] Institute of Geospatial Information, Information Engineering University, Zhengzhou
[2] 63850 Troops, Baicheng
[3] School of Geodesy and Geomatics, Wuhan University, Wuhan
[4] Xi'an Research Institute of Surveying and Mapping, Xi'an
[5] State Key Laboratory of Geo-Information Engineering, Xi'an
[6] State Key Laboratory of Geodesy and Earth's Dynamics, Wuhan
来源：
Zhongguo Guanxing Jishu Xuebao/Journal of Chinese Inertial Technology | 2018年 / 26卷 / 06期
关键词：
Boundary value problem; Gravity disturbances; gravity anomalies; Green formula; Hotine formula;
D O I：
10.13695/j.cnki.12-1222/o3.2018.06.012
中图分类号：
学科分类号：
摘要：
Accurate navigation of inertial navigation systems needs the support of the Earth's gravity field information. However, there are few studies on the use of gravity disturbances to calculate the gravity disturbance vectors of the Earth's external space. Aiming at the calculation of these gravity disturbance vectors, the formula for calculating the gravity disturbance vectors by using gravity disturbances and the Green integral with real terrain surface is deduced, and the formula for calculating the gravity disturbance vector by using gravity disturbances and the Hotine integral is given. Comparative analysis on Green integral method, Hotine integral method and point mass model method are conducted by numerical experiments, and the results show that all the three methods can approximate the disturbance gravity vectors at an accuracy of better than 2 mgal at 3 km altitude. The proposed methods can provide references for determining the gravity disturbance vectors of the Earth's external space. © 2018, Editorial Department of Journal of Chinese Inertial Technology. All right reserved.
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页码：773 / 777
页数：4
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