Living Planet   



Dr. Erricos Pavlis(1)

(1) JCET/UMBC - NASA/GSFC, 1000 Hilltop Circle, Baltimore, Maryland 21250, United States


JCET is contributing to current efforts to enhance the geopotential model underlying the World Geodetic System 84 (WGS 84), and in particular, with the incorporation of data from new missions such as CHAMP at present, and GRACE and GOCE in the future. One of the many enhancements that the new development incorporates is the modeling of temporal variations for the long wavelength components of the field, in order to avoid aliasing of these signals and a consequent degradation in the quality of the new model. Currently, and until we accumulate several years of GRACE data, the best data source for determining these variations are satellite laser ranged geodetic targets (such as the LAGEOS, ETALON, AJISAI, STARLETTE, STELLA, etc.). While the data from these satellites provide the definition of the underlying Terrestrial Reference Frame, its crust-fixed orientation, and the temporal variations in the long wavelength, the detailed components of the gravitational model will be primarily determined from the data of dedicated missions such as CHAMP, GRACE, and GOCE in the future. We will present preliminary results of a new analysis of our expanded data set using NASA Goddard’s GEODYN/SOLVE II software, and our plans for incorporating the GOCE data in the future.


Workshop poster

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry