Mars high resolution gravity fields from MRO, Mars seasonal gravity, and other dynamical parameters

被引：279

作者：

Konopliv, Alex S. ^{[1
]}

Asmar, Sami W. ^{[1
]}

Folkner, William M. ^{[1
]}

Karatekin, Ozgur ^{[2
]}

Nunes, Daniel C. ^{[1
]}

Smrekar, Suzanne E. ^{[1
]}

Yoder, Charles F. ^{[1
]}

Zuber, Maria T. ^{[3
]}

机构：

[1] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[2] Royal Observ Belgium, B-1180 Brussels, Belgium

[3] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA

来源：

ICARUS | 2011年 / 211卷 / 01期

基金：

美国国家航空航天局;

关键词：

Mars; Interior; Geophysics; Planetary dynamics; Asteroids; GENERAL-CIRCULATION MODEL; SOLAR GRAVITATIONAL DEFLECTION; INTERNAL STRUCTURE; TIME VARIATIONS; GLOBAL SOLUTION; RADIO TRACKING; CARBON-DIOXIDE; TOPOGRAPHY; SURFACE; CONSTRAINTS;

D O I：

10.1016/j.icarus.2010.10.004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

With 2 years of tracking data collection from the MRO spacecraft, there is noticeable improvement in the high frequency portion of the spherical harmonic Mars gravity field. The new JPL Mars gravity fields, MRO110B and MRO110B2, show resolution near degree 90. Additional years of MGS and Mars Odyssey tracking data result in improvement for the seasonal (J) over bar (3) gravity changes which compares well to global circulation models and Odyssey neutron data and Mars rotation and precession ((psi) over dot = -7594 +/- 10 mas/year). Once atmospheric dust is accounted for in the spacecraft solar pressure model, solutions for mars solar tide are consistent between data sets and show slightly larger values (k(2) = 0.164 +/- 0.009, after correction for atmospheric tide) compared to previous results, further constraining core models. An additional 4 years of Mars range data improves the Mars ephemeris, determines 21 asteroid masses and bounds solar mass loss (dGM(Sun)/dt < 1.6 x 10(-13) GM(Sun) year(-1)). (C) 2010 Elsevier Inc. All rights reserved.

引用

页码：401 / 428

页数：28

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