Recovery of long-wavelength mean gravity anomalies for the dedicated gravitational satellite (GRAVSAT) mission

Details Recovery of long-wavelength mean gravity anomalies for the dedicated gravitational satellite (GRAVSAT) mission Recovery of long-wavelength mean gravity anomalies for the dedicated gravitational satellite (GRAVSAT) mission

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983acaau..10....9p&link_type=abstract

Acta Astronautica (ISSN 0094-5765), vol. 10, Jan. 1983, p. 9-17.

Astronomy and Astrophysics

Astronomy

Geopotential Research Mission, Gravitational Waves, Gravity Anomalies, Planetary Gravitation, Computerized Simulation, Cross Correlation, Standard Deviation

Scientific paper

A computer simulation study to determine how well long-wavelength variations in the earth's gravitational field can be recovered from satellite-to-satellite tracking data is described. Using a batch least squares technique, the program determines the accuracy of parameter solutions for a wide category of possible error sources, including tracking station positions, gravitational constant, earth body tides, tropospheric modeling, and measurement noise. Using only one day's worth of data, the mean of the standard deviations of the 162 20 deg x 20 deg gravity anomaly blocks is about 1 microgal. For a six-month mission this projects to less than 0.1 microgal. Because of the potential of increased measurement precision at shorter separation distances, and the relative insensitivity of the recovery process to separation distances, it should be possible to recover both long and short wavelength variations with a modest distribution of separation distances tailored primarily to the short wavelength recovery.

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