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Federal
Geoid Height and Deflections of the Vertical Models - National Geospatial Data Asset (NGDA) Geoid Models NGDA
National Oceanic and Atmospheric Administration, Department of Commerce —
In Gauss' words, the geoid is "the mathematical figure of the Earth". This figure is an equipotential surface coincident with the idealized mean sea surface. The... -
Federal
Geomagnetic Components D, H, X, Y, Z, and R 10-second Instantaneous Measurements
National Oceanic and Atmospheric Administration, Department of Commerce —
These data are generated as part of the International Magnetospheric Study. The file consists of 10-second instantaneous measurements for the geomagnetic components... -
Federal
Instantaneous Absolute Values of the Geomagnetic Components D, H, and Z or X,Y, and Z at 1-minute Intervals for 50 Observatories Database
National Oceanic and Atmospheric Administration, Department of Commerce —
The file is comprised of instantaneous absolute values of the geomagnetic components D, H, and Z or X, Y, and Z at 1-minute intervals. These values were derived...