Long wavelength Earth gravity field model series from satellite tracking data only, spherical harmonic representation
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https://cmr.earthdata.nasa.gov/search/concepts/C1214585736-SCIOPS.html
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资源简介：
GRIM4-S global gravity field models are based on the analysis of satellite
orbit perturbations from optical, doppler, laser and GPS-SST tracking data of
about 30 satellites. The models are given as a set of fully normalized
spherical harmonic coefficient complete to degree and order 50 with for the
most recent models higher degree terms within resonant orders.
The first solution GRIM4-S1 includes from 27 satellites. This model has been
augmented by additional data leading to the GRIM4-S2 (29 satellites), GRIM4-S3
(30 satellites) and GRIM4-S4 (32 satellites) solutions.
提供机构：
SCIOPS
