A simulation of Martian gravity field recovery by using a near equatorial orbiter

	A simulation of Martian gravity field recovery by using a near equatorial orbiter
	Yan, Jianguo 1,2; Li, Fei1 ; Ping, Jingsong 3; Dohm, James M.4; Harada, Yuji 3; Zhong, Zhen 1
刊名	ADVANCES IN SPACE RESEARCH
	2012-03-01
卷号	49 期号:5 页码:1019-1027
关键词	Near equatorial orbit Martian gravity field Precise orbit determination Covariance Time variable gravity
英文摘要	An improvement to the Martian gravity field may be achieved by means of future orbiting spacecraft with small eccentricity and low altitude exemplified through a newly proposed mission design that may be tested in upcoming reconnaissance of Mars. Here, the near equatorial orbital character (with an inclination approximating 10 degrees, eccentricity as 0.01 and semi-major axis as 4000 km) is considered, and its contribution to Martian gravity field solution is analyzed by comparing it with a hypothetical polar circular orbiter. The solution models are evaluated in terms of the following viewpoints: power spectra of gravity field coefficients, correlations of low degree zonal coefficients, precise orbit determination, and error distribution of both Mars free air gravity anomaly and areoid. At the same time, the contributions of the near equatorial orbiters in low degree zonal coefficients time variations are also considered. The present results show that the near equatorial orbiter allows us to improve the accuracy of the Martian gravity field solution, decrease correlation of low degree zonal coefficients, retrieve much better time variable information of low degree zonal coefficients, improve precise orbit determination, and provide more accurate Mars free air gravity anomaly and areoid around the equatorial region. (C) 2011 COSPAR. Published by Elsevier Ltd. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
研究领域[WOS]	Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
关键词[WOS]	MARS ; PLANETS ; GEODESY ; MODELS
收录类别	SCI
语种	英语
WOS记录号	WOS:000301610600018
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/18086]
专题	上海天文台_天文地球动力学研究中心
作者单位	1.Wuhan Univ, State Key Lab Informat Engn Surveying Mapping & R, Wuhan 430070, Peoples R China 2.Natl Inst Nat Sci, Natl Astron Observ Japan, RISE Project, Oshu 0230861, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, Ctr Astrogeodynam Res, Shanghai 200030, Peoples R China 4.Univ Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721 USA
推荐引用方式 GB/T 7714	Yan, Jianguo,Li, Fei,Ping, Jingsong,et al. A simulation of Martian gravity field recovery by using a near equatorial orbiter[J]. ADVANCES IN SPACE RESEARCH,2012,49(5):1019-1027.
APA	Yan, Jianguo,Li, Fei,Ping, Jingsong,Dohm, James M.,Harada, Yuji,&Zhong, Zhen.(2012).A simulation of Martian gravity field recovery by using a near equatorial orbiter.ADVANCES IN SPACE RESEARCH,49(5),1019-1027.
MLA	Yan, Jianguo,et al."A simulation of Martian gravity field recovery by using a near equatorial orbiter".ADVANCES IN SPACE RESEARCH 49.5(2012):1019-1027.