Review article

Satellite Mission Gravity Recovery and Climate Experiment (GRACE)

Željko Hećimović ; Zagreb, Croatia
Tomislav Bašić orcid.org/0000-0003-2655-6130 ; Faculty of Geodesy, University of Zagreb, Zagreb, Croatia

Abstract

GRACE is satellite mission with the primary goal of sensing the Earth’s gravity field and collecting atmospheric parameters using GPS-radio occultation measurement as the secondary goal. GRACE-mission is using two satellites in the same orbit as sensors for scanning gravity field. The main GRACE gravity field modeling data are continuous high precision distances measurements between GRACE-satellites. Earth gravity field is changing, in annual scale, for small amounts and it is dominantly static field. GRACE-mission will sense weak gravity signals of moving masses in hydrological cycles, moving of the plate tectonic, moving of the magma and other masses. GRACE-satellites need one month to collect data for the whole Earth and GRACE-gravity models are made on monthly basis. GRACE-gravity models are developed to high resolutions. Using sophisticated mathematical modeling, topography signal is clearly recovered from GRACE gravity field measurements. One of the first GRACE-gravity field models is GGM01S. It is developed up to degree and order 120 (selected coefficients up to 140). Problem of determining figure of the Earth using GRACE-data will become dynamical problem. GRACE-mission has big influence on development of geodesy, geology, hydrology and oceanography.

Keywords

GRACE satellite mission; geosystem; mass movements; water circulation; static and dynamic Earth’s gravity field

Hrčak ID:

2281

URI

https://hrcak.srce.hr/2281

Publication date:

10.9.2005.

Article data in other languages: croatian

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