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Analyse der Satellitendaten für die Klimaforschung

GeoWerkstatt-Projekt des Monats Juli 2017

Projekt: Data Analysis challenges for GRACE and GRACE follow-on

Forschende: Majid Naeimi

Projektidee:  From simple to sophisticated simulations for GRACE and GRACE follow-on community

The Data Analysis Challenge project is an initiative in the framework of the geo-Q project at Leibniz Universität Hannover. The aim of these challenges is to engage different research centers and also interested individuals around the world to test their methods for gravity field recovery (GFR) from simulated data which will lead to develop data analysis tools and capabilities for GRACE Follow-On data. GRACE Follow-On satellites will be launched in 2017/2018, with additional Laser Ranging Instrument (LRI) sensor. It is an exciting era in satellite geodesy, and the race is on to reach better spatial and temporal resolution for the Earth's gravity field. There are number of different ways to recover the Earth's gravity field from satellite data. The challenges are coordinated from simple gravity field recovery in 2016 to more advanced forms when LRI noise model will be added in 2016/2017 challenge.

Three different challenges are foreseen in this project. The goal of challenge 1 is to compare different gravity field recovery methods under controlled conditions, where a well-defined set of parameters is used to simulate data. The challenge 2 will investigate the use of the LRI data, in particular ranging and attitude measurements, in the context of different gravity field recovery methods. Challenge 3 aims at investigating the ability of different gravity field recovery methods to reproduce the underlying mass distributions (e.g. ice mass loss in Greenland) in a set of simulated GRACE Follow-On data.