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Towards validation of satellite gradiometric data using modified version of 2nd order partial derivatives of extended Stokes’ formula

Eshagh M.

Artificial Satellites : Journal of Planetary Geodesy

2009

Vol. 44, No. 4

103--129

The satellite gradiometric data should be validated prior to being used. One way of such a validation process is to use some integral estimators which are the second-order partial derivatives of the extended Stokes formula to regenerate the data from the gravity anomaly at the topographic surface. In this paper, we present how least-squares modification methods are used to modify such integral estimators. Our concentration will be on validation of the vertical-horizontal and horizontalhorizontal elements of the gravitational tensor at satellite level. The paper will formulate the elements of the system of equations from which the modification parameters are derived based on all types of least-squares modification. The truncation and Paul’s coefficients will also be modelled.