Point Gravity Data

1.   ASCII Gravity Data File (*.asc)

The fields are listed in this order:

1. Data source (from the NGDC 99_CD)
2. Longitude, negative west, in degrees
3. Latitude, positive north, in degrees
4. Free Air gravity anomaly, in milligals
5. Complete Bouguer gravity anomaly, in milligals, reduction density 2.67 g/cc
6. Elevation in meters
7. not used
8. Terrain correction, milligals, 0.895 to 167 km
9. Observed gravity, in milligals, minus 980,000 milligals, referenced to the IGSN71 datum


comment:  gravity anomaly calculations computed using the GRS67 model