Table 1. Contemporary Earth's gravitational models characteristics
MAX.
MODEL
DEG.
DATA USED
ORGANIZATION
REFERENCES
AND
ORDER
GEM-TIS
50x50
0, L, D, SST, S
NASAlGSFC
LerCh et a1. (1994)
GEM-TI
50x50
0, L, D, SST, S, SA, SG
NASAlGSFC
Lerch et a1. (1994)
GEM-TIA
50x50
0, L, D, SST, S, SA,
NASAlGSFC
Nerem et a1. (1994a)
SG,DO
GRIM4-C3
60x60
0, L, D, SA, SG, DO, SST
GFC+GRGS
Schwintzer et a1. (1992)
GRIM4-S3
60x60
0, L, D, DO, SST
GFC+ GRGS
GRIM4-S4P
66x66
0, L, D, DO, SST
GFC+ GRGS
Schwintzer (1995)
JEG-2B
50x50
L,D, SA,SG
UT/CSR
Tapley et a1. (1991)
OSU91A
360x360
GEM-T2+ SA, SG
OSU
Rapp et a1. (1991)
WGS-84
180 x 180
L,D, SA,SG
DMA
Decker (1986)
JGM-l
70x70
0, L, D, SA, SG, DO, SST
NASAlGSFC+
Nerem et a1. (1994b)
JGM-2
70x70
0, L, D, SA, SG, DO, SST
UT/CSR+
CNES
JGM-3
70x 70
0, L, D, SA, SG, DO, SST
Tapley et a1. (1994)
o Optical
L
Laser ranging
D
Doppler
S
United S-Band average range rate
SST Satellite-to-Satellite Tracking
SA Satellite Altimetry
DO DORIS
SG Surface Gravity
NASAlGSFC - NASA Goddard Space Flight Center, Greenbelt, USA
GFZ - GeoF orschungsZentrum, Potsdam, Germany
GRGS - Groupe de Recherche de Geodesie Spatiale, Toulouse, France
UT/CSR - University of Texas Centr for Space Research, Austin, USA
OSU - Ohio State University Department of Geodetic & Surveying, Columbus, USA
CNES - Centre National d'Etudes Spatiales, Toulouse, France
DMA - Defense Mapping Agency, USA
200