Transformation Values Local DATUM to WGS 84 Eastern Test Range Area
DEFENSE MAPPING AGENCY HYDROGRAPHIC/TOPOGRAPHIC CENTER WASHINGTON DC
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A new World Geodetic System WGS 84 was developed to replace the existing WGS 72 which has been in use for several years. This new WGS 84 system has an improved Earth Gravitational Model with orientation and scale changes from the WGS 72. The WGS 84 was developed using worldwide doppler derived station coordinates, laser satellite tracking data, satellite radar altimetry and gravity observations. Reference a. gives the unclassified information pertaining to the WGS 84 and its relationship with various datums throughout the world. The following report provides transformation parameters to determine WGS 84 coordinates for geographical areas of interest to the Eastern Test Range. The delta values vary slightly much much less 2m from Reference a. due to direct satellite observation with doppler receivers in each area and reduction on the WGS 84 system which improves the accuracy of the results.