Earth's Gravity Field Derived from Grace Satellite Tracking Data

2006 ◽  
Vol 49 (3) ◽  
pp. 651-656 ◽  
Author(s):  
Xu-Hua ZHOU ◽  
Houtse HSU ◽  
Bin WU ◽  
Bi-Bo PENG ◽  
Yang LU
Keyword(s):  
Gravity Field ◽  
Satellite Tracking ◽  
Tracking Data ◽  
Earth’S Gravity Field ◽  
Grace Satellite

Processing of GRACE FO satellite to satellite tracking data using the GRACE SIGMA software

2020 ◽  
Author(s):  
Mathias Duwe ◽  
Igor Koch ◽  
Jakob Flury ◽  
Akbar Shabanloui
Keyword(s):  
Gravity Field ◽  
Satellite Tracking ◽  
Background Modeling ◽  
Gravity Potential ◽  
Laser Ranging ◽  
Tracking Data ◽  
Variational Equations ◽  
Range Rate ◽  
Orbit Types ◽  
Computing Approach

<p>At our Institute we compute monthly gravity potential solutions from GRACE/GRACE-FO level 1B data by using the variational equations approach. The gravity field is recovered with our own MATLAB software "GRACE-SIGMA" that was recently updated in order to reduce the calculation time with parallel computing approach by approx. 80%. Also the processing chain has changed to update the background modeling and we made tests with different orbit types and different parametrizations. We discuss progress to include laser ranging interferometer data in gravity field solutions. We present validation results and analyze the properties of postfit range-rate residuals.</p>

Probing the Earth’s gravity field by means of satellite-to-satellite tracking

1977 ◽  
Vol 284 (1326) ◽  
pp. 475-483 ◽  
Keyword(s):  
Gravity Field ◽  
Signal To Noise Ratio ◽  
Gravity Anomalies ◽  
Small Variation ◽  
Satellite Tracking ◽  
Practical Advantage ◽  
Earth’S Gravity Field ◽  
Ground Station ◽  
Local Gravity ◽  
Range Rate

The idea of tracking one spacecraft from another grew out of some tracking studies performed early in the Apollo programme (1962-3). The main practical advantage of such a technique is that ( a ) contact time with a low orbiting spacecraft can be increased considerably (approximately 50 min v . 5 min for a single ground station); ( b ) the number of ground stations can be reduced; ( c ) the dependency on stations on foreign soil can almost be eliminated; and ( d ) detailed studies of spacecraft motions due to small variations in the Earth’s gravity field (anomalies) may be detectable. This paper describes specifically two satellite-to-satellite tracking (s. s. t.) tests, namely ( a ) the ATS-6/Geos-3 and ( b ) the ATS-6/Apollo-Soyuz experiment and some of the results obtained. The main purpose of these two experiments was first to track via ATS-6 the Geos-3 as well as the Apollo-Soyuz and to use these tracking data to determine ( a ) both orbits, that is, ATS-6, Geos-3 and/or the Apollo-Soyuz orbits at the same time; ( b ) each of these orbits alone, and ( c ) test the ATS-6/Geos-3 and /or Apollo-Soyuz s. s. t. link to study local gravity anomalies; and, second, to test communications, command and data transmission from the ground via ATS-6 to these spacecraft and back again to the ground (Rosman, N. G.). Most of the interesting data obtained to date originate from the Apollo-Soyuz geodynamics experiment. Thus, it will be discussed in some detail. Gravity anomalies of say 3-5 mGal (3-5 × 10 -5 m s -2 ) or larger having wavelength of 500-1000 km on the Earth’s surface are important for studies of the upper layers of the earth. Such anomalies were actually ‘seen’ for the first time from space as signatures in the form of very small variation (order of ~ 1 to 2 cm/s) in the range rate between ATS-6, Geos-3 and Apollo-Soyuz. Since the measured range noise turned out to be only 0.03- 0.05 cm/s on the average, these signatures were detected with an excellent signal-to-noise ratio. Orbit determination examples using s. s. t. data from ATS-6 and Geos-3 are also discussed in detail together with errors associated with the orbits of Geos-3. Further, signature studies and gravity anomaly detections with s. s. t. data will be shown and discussed in detail.

scholarly journals GRACE application for geological and geographical problems

2017 ◽  
pp. 3-7
Author(s):  
N. S. Tkachenko ◽  
I. V. Lygin
Keyword(s):  
High Resolution ◽  
Literature Review ◽  
Gravity Field ◽  
Satellite Mission ◽  
Earth’S Gravity Field ◽  
Precise Mapping ◽  
Grace Satellite ◽  
Gravity Recovery

In this article we provide the literature review of the geological and geographical problems which were successfully solved due to application of GRACE satellite mission data. GRACE (Gravity Recovery And Climate Experiment) is gravitational satellite mission the purpose of which is precise mapping of variations of Earth’s gravity field. The data has high resolution that gives the opportunity to solve a lot of geological and geographical problems.

scholarly journals A High-Resolution Earth’s Gravity Field Model SGG-UGM-2 from GOCE, GRACE, Satellite Altimetry, and EGM2008

Engineering ◽  
2020 ◽  
Vol 6 (8) ◽  
pp. 860-878
Author(s):  
Wei Liang ◽  
Jiancheng Li ◽  
Xinyu Xu ◽  
Shengjun Zhang ◽  
Yongqi Zhao
Keyword(s):  
High Resolution ◽  
Gravity Field ◽  
Satellite Altimetry ◽  
Field Model ◽  
Gravity Field Model ◽  
Earth’S Gravity Field ◽  
Grace Satellite

Gravity-field determination from laser observations

1977 ◽  
Vol 284 (1326) ◽  
pp. 515-527 ◽  
Keyword(s):  
Gravity Field ◽  
Spherical Harmonics ◽  
Field Model ◽  
Satellite Tracking ◽  
Sea Surface ◽  
Tracking Data ◽  
Gravity Field Model ◽  
Long Wavelength ◽  
Gravity Field Determination

Knowledge of long-wavelength features of the geopotential is significantly improved by the use of precision satellite tracking with lasers. Tracking data on nine satellites are combined with terrestrial gravimetry to obtain a spherical-harmonics representation of the geopotential complete through degree and order 24. An improved gravity-field model provides better satellite ephemerides and a reference for analysing satellite-to-sea-surface altimetry.

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