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Regional gravity field modelling by inverting first-, second- and third-order radial derivatives of the disturbing gravitational potential measured on moving platforms – case study for Europe

Citace:
PITOŇÁK, M., ŠPRLÁK, M., NOVÁK, P., TENZER, R. Regional gravity field modelling by inverting first-, second- and third-order radial derivatives of the disturbing gravitational potential measured on moving platforms – case study for Europe. Istanbul, Turecko, 2016.
Druh: PŘEDNÁŠKA, POSTER
Jazyk publikace: eng
Anglický název: Regional gravity field modelling by inverting first-, second- and third-order radial derivatives of the disturbing gravitational potential measured on moving platforms – case study for Europe
Rok vydání: 2016
Autoři: Ing. Martin Pitoňák Ph.D. , Ing. Michal Šprlák Ph.D. , Prof. Ing. Pavel Novák Ph.D. , Ing. Robert Tenzer Ph.D.
Abstrakt EN: The first decade of the new millennium witnessed realization of three gravity-dedicated satellite missions which allow for measuring values of vectorial (Gravity Recovery And Climate Experiment – GRACE) and second-order tensorial (Gravity field and steady-state Ocean Circulation Explorer – GOCE) parameters of the Earth’s gravitational potential. It is foreseen that components of a third-order gravitational tensor in space might potentially become available in the near future. A concept of such a gravity field-dedicated satellite mission called OPTIMA (OPTical Interferometry for global Mass change detection from space) has currently been under investigation. In this contribution we investigate possibilities of the regional gravity field recovery from first-, second- and third-order radial derivatives of the disturbing gravitational potential measured by sensors on moving platforms. Synthetic measurements along a satellite orbit at the altitude of 250 km above ground are synthetized from the global gravitational model EGM2008 and polluted by the Gaussian noise. Firstly, we recover the disturbing gravitational potential from each quantity separately. Secondly, the combination of measured quantities is investigated. The process of downward continuation of measured data is stabilized by two methods, namely the Tikhonov regularization and the variance component estimation (VCE). Estimated values of the disturbing gravitational potential are compared with their counterparts synthesized directly from EGM2008.
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