Potential Coefficient Determinations from 10 deg Terrestrial Gravity Data by Means of Collocation.

Abstract
The method of least squares collocation is used to estimate geopotential coefficients from 416 10 deg mean anomalies. The result is compared to the solutions by pure integration. For low degrees (n or = 12) the differences between the two types of solutions are generally within 6%; for higher degrees the differences increase. The coefficients obtained by collocation do not change more than 4% when elevation information is included (except for n = 3). However, for n = 3, large discrepancies (10%) were found among all solutions. The computations by collocation were at least 30 times more time consuming than the integrations. In order to reduce the computation time in applying the former method for larger systems (such as 5 deg anomalies), an alternative computation procedure is outlined. (Author)

This publication has 0 references indexed in Scilit: