Determination of Earth Gravity Field Model WHU-GM-05 Using Grace Gravity Data

2008 ◽  
Vol 51 (5) ◽  
pp. 967-975 ◽  
Author(s):  
Zheng-Tao WANG ◽  
Jian-Cheng LI ◽  
Wei-Ping JIANG ◽  
Ding-Bo CHAO
Keyword(s):  
Gravity Field ◽  
Field Model ◽  
Gravity Data ◽  
Gravity Field Model ◽  
Earth Gravity Field ◽  
Earth Gravity ◽  
Earth Gravity Field Model

GGM02 – An improved Earth gravity field model from GRACE

2005 ◽  
Vol 79 (8) ◽  
pp. 467-478 ◽  
Author(s):  
B. Tapley ◽  
J. Ries ◽  
S. Bettadpur ◽  
D. Chambers ◽  
M. Cheng ◽  
...  
Keyword(s):  
Gravity Field ◽  
Field Model ◽  
Gravity Field Model ◽  
Earth Gravity Field ◽  
Earth Gravity ◽  
Earth Gravity Field Model

The CHAMP-only earth gravity field model EIGEN-2

2003 ◽  
Vol 31 (8) ◽  
pp. 1883-1888 ◽  
Author(s):  
Ch Reigber ◽  
P Schwintzer ◽  
K.-H Neumayer ◽  
F Barthelmes ◽  
R König ◽  
...  
Keyword(s):  
Gravity Field ◽  
Field Model ◽  
Gravity Field Model ◽  
Earth Gravity Field ◽  
Earth Gravity ◽  
Earth Gravity Field Model

An Earth gravity field model complete to degree and order 150 from GRACE: EIGEN-GRACE02S

2005 ◽  
Vol 39 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Christoph Reigber ◽  
Roland Schmidt ◽  
Frank Flechtner ◽  
Rolf König ◽  
Ulrich Meyer ◽  
...  
Keyword(s):  
Gravity Field ◽  
Field Model ◽  
Gravity Field Model ◽  
Earth Gravity Field ◽  
Earth Gravity ◽  
Earth Gravity Field Model

Precise LEO satellite orbit determination and Earth gravity field modeling with carrier-range method

2020 ◽  
Author(s):  
Geng Gao ◽  
Xiancai Zou ◽  
Shoujian Zhang ◽  
Bingshi Liu
Keyword(s):  
Gravity Field ◽  
Field Model ◽  
Satellite Orbit ◽  
Gravity Field Model ◽  
Earth Gravity Field ◽  
Earth Gravity ◽  
Field Modeling ◽  
Earth Gravity Model ◽  
Gravity Field Modeling ◽  
Leo Satellite

<p>Precise LEO satellite orbit determination(OD) and Earth gravity field modeling are researched in this study.</p><p>Firstly, on the basis of Precise Point Positioning Ambiguity Resolution(PPPAR), a kinematic LEO satellite OD algorithm based on the epoch-difference and post-facto iteration is introduced, which plays a vital rule in the detection of the phase cycle slip to achieve the best orbit accuracy. The experiments of GRACE satellite OD with zero-difference IF combination observations spanning one year of 2010 show that, compared to the JPL reference orbits, the daily average 3D RMS is generally below 5.0cm for the float solution, while that is below 4.0cm for the fixed solution.</p><p>Secondly, to solve the problem that specific a-priori information like earth gravity field model must be involved in LEO’ reduced dynamic OD, the simultaneous solution method, which is specially on the relation with the kinematic OD and reduced dynamic OD, is used and the carrier-range, which can be recovered from phase observations once the kinematic OD process using Integer Ambiguity Resolution (IAR) technology is carried out, is naturally applied to this method. With the experiments based on the data over a period of the year of 2010, comes some evacuations, including the external checks on the accuracy of the orbits and the analysis on the earth gravity model. The numerical results show that, compared to the JPL reference orbits, the 3D RMS is below 3.0cm and the RMS is below 2.0cm for each component. As for the accuracy of gravity field model, compared to some contemporary significant earth gravity model, the model of the single month solution behaves very well below the 60 degree of the gravity field’s coefficients, while over the 60 degree, only the UTCSR model quite corresponds to the model computed by this method. Therefore, due to the promotion of the orbital accuracy and gravity field model, we suggest that the recovered carrier-range should be implemented in the simultaneous method for the better product solution of the LEO’s missions.</p>

scholarly journals Analysis of one month of CHAMP state vector and accelerometer data for the recovery of the gravity potential

2003 ◽  
Vol 1 ◽  
pp. 1-4 ◽  
Author(s):  
E. Howe ◽  
L. Stenseng ◽  
C. C. Tscherning
Keyword(s):  
Energy Conservation ◽  
Gravity Field ◽  
State Vector ◽  
Field Model ◽  
Gravity Data ◽  
Gravity Potential ◽  
Accelerometer Data ◽  
Gravity Field Model ◽  
Energy Conservation Method ◽  
Conservation Method

Abstract. The energy conservation method is based on knowledge of the state vector and measurements of nonconservative forces. This is or will be provided by CHAMP, GRACE and GOCE. Here the analysis of one month of CHAMP state vector and accelerometer data is described. The energy conservation method is used to estimate the gravity potential at satellite altitude. When doing so we consider the tidal potential from the sun and the moon, the explicit time variation of the gravity potential in inertial space and loss of energy due to external forces. Fast Spherical Collocation have been used to estimate a gravity field model to degree and order 90, UCPH2002 04. This gravity field model is compared to EGM96 and EIGEN-2. The largest differences with respect to EGM96 are found at those places where the gravity data used to determine EGM96 had the largest uncertainty. EIGEN-2 and UCPH2002 04 are similar, though there are some differences in Antarctica and Central Asia.

Sign in / Sign up

Export Citation Format

Share Document