HR: 1340h
AN: G33C-0058    [Abstracts]
TI: Representing the Gravity field using collocation and Ries Representers.
AU: * Knudsen, P
EM: pk@spacecenter.dk
AF: Danish National Space Center, Juliane Maries Vej 30, Copenhagen, DK-2100 Denmark
AU: Tscherning, C C
EM: cct@gfy.ku.dk
AF: University of Copenhagen, Juliane Maries vej 30, Copenhagen, DK-2100 Denmark
AU: Andersen, O B
EM: oa@spacecenter.dk
AF: Danish National Space Center, Juliane Maries Vej 30, Copenhagen, DK-2100 Denmark
AB: Least squares collocation is an estimation technique where discretely located observations of different kinds can be integrated. The technique allows a rigorous description of the full covariance associated with signal, the errors as well as the estimated quantities. In this presentation error covariances associated with the gravity field and the ocean dynamic topography are analysed and described. The multi-disciplinary project "Geoid and Ocean Circulation in the North Atlantic (GOCINA)" aims at enhancing the European capacity in Earth observation using data from the approved European Space Agency missions ENVISAT and GOCE. The project will in particular support the GOCE mission with a set of specific recommendation for integrating GOCE in ocean circulation studies and an accurate geoid model for validation purposes. The integration data streams from three independent technologies - eg. GOCE gravimetry and satellite altimetry- into a single process may deliver an `optimal' Mean Dynamical Topography. Two examples of the technique used on GOCINA data are presented One example where the standard GOCE gravity field models are used and one example where GOCE data are used directly in least squares collocation to obtain an optimal product.
UR: http://www.gocina.dk
DE: 1200 GEODESY AND GRAVITY
DE: 1295 Integrations of techniques
DE: 1299 General or miscellaneous (1709)
SC: Geodesy [G]
MN: Fall Meeting 2005