ELIP: Reference Ellipsoid

This record specifies a reference ellipsoid to be used in GeoLab computations.

A reference ellipsoid is an ellipsoid of revolution (generated by rotating an ellipse about its minor axis) that is used as a mathematical representation of the Earth's surface. Coordinates of points with respect to a reference ellipsoid are specified as the ellipsoidal latitude, ellipsoidal longitude, and ellipsoidal height.

The format of the ELIP record is as follows:

Columns 002-005: ELIP
Columns 007-022: Ellipsoid name
Columns 024-036: Major semi-axis
Columns 038-050: Minor semi-axis
Columns 052-059: X-translation from geocenter
Columns 061-068: Y-translation from geocenter
Columns 070-077: Z-translation from geocenter
Columns 079-080: Linear unit name
Columns 082-089: X-rotation (seconds)
Columns 091-098: Y-rotation (seconds)
Columns 100-107: Z-rotation (seconds)
Columns 109-116: Scale change (PPM)