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Proposing Institution

Lehrstuhl für Astronomische und Physikalische Geodäsie, TUM
Project Manager

Dr.-Ing. Thomas Gruber
Arcisstr.
80333 München
Abstract
The purpose of the GOCE gravity field satellite mission is to determine the Earth's gravity field model with very high accuracy and resolution, which leads to a model with not less than 90 000 parameters. In addition, by combining GOCE data with data from other satellite missions and surface observations the number of parameters might increase to 500000 and more. In order to estimate these parameters, an efficient software as well as a high performance computer are necessary to be combined together. The sampling rate of the GOCE data is one second. Over 2 years, the total number of the samples from this mission can reach about 63 Millions (2*365*86400). The total number of additional observations from other satellite missions and on the Earth surface can reach a similar level. It is a huge inversion problem to estimate a set of 90 000 parameters and more with several Millions of observations. This problem can only be solved with adequate computer resources and sophisticated algorithm. For several tasks in this framework the Geodesy LINUX-Cluster is in use. But specific problems require more computing power and computer memory. After finishing this project, we can provide a global high resolution gravity field model to scientific community with unprecedented accuracy and resolution. Such a model can be used as reference surface for climate studies and serves main input for geophysical analyses and the determination of the ocean circulation patterns.

Impressum, Conny Wendler