Physics
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mgeo...16..191s&link_type=abstract
Manuscr. Geod., Vol. 16, No. 3, p. 191 - 204
Physics
Scientific paper
The Japanese Experimental Geodetic Satellite "Ajisai" was launched on August 12, 1986. In response to the TOPEX-POSEIDON mission requirements, the Goddard Space Flight Center Space Geodesy Branch and its associates are producing improved models of the Earth's gravitational field. With the launch of Ajisai, the authors now have precise laser data which can be used to test many current gravity models. Analysis of Ajisai utilising various gravity field models show improvements of more than 70% in the orbital fits when using GEM-T1 and GEM-T2 relative to results obtained with the earlier GEM-10B model. The GEM-T2 orbital fits are at the 13 cm level (RMS). Further studies using extensions of the GEM-T1 model indicate that the addition of satellite altimetry and surface gravity anomalies as additional data types should improve future gravity field models.
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