Effect of External Disturbing Gravity Field on Spacecraft Guidance and Surveying Line Layout for Marine Gravity Survey

doi:10.11947/j.AGCS.2016.20160175

Abstract

Abstract: Centred on the support requirement of flying track control for a long range spacecraft, a detail research is made on the computation of external disturbing gravity field, the survey accuracy of gravity anomaly on the earth' surface and the program of surveying line layout for marine gravity survey. Firstly, the solution expression of navigation error for a long range spacecraft is analyzed and modified, and the influence of the earth's gravity field on flying track of spacecraft is evaluated. Then with a given limited quota of biased error of spacecraft drop point, the accuracy requirement for calculating the external disturbing gravity field is discussed and researched. Secondly, the data truncation error and the propagated data error are studied and estimated, and the quotas of survey resolution and computation accuracy for gravity anomaly on the earth' surface are determined. Finally, based on the above quotas, a corresponding program of surveying line layout for marine gravity survey is proposed. A numerical test has been made to prove the reasonableness and validity of the suggested program.

Key words: marine gravity survey, requirement analysis, spacecraft guidance, disturbing gravity, surveying line layout

CLC Number:

P229

HUANG Motao, LIU Min, OUYANG Yongzhong, DENG Kailiang, ZHAI Guojun, LU Xiuping, WU Taiqi. Effect of External Disturbing Gravity Field on Spacecraft Guidance and Surveying Line Layout for Marine Gravity Survey[J]. Acta Geodaetica et Cartographica Sinica, 2016, 45(11): 1261-1269.

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