| Summary: | A high resolution local geoid was calculated for the Monterey Bay, CA using local gravimetry data, digital elevation data and The Ohio State University OSU91A global geopotential model. The theoretical accuracy of the calculated local geoid is 3.5 cm or better over 5 km. Local gravity data came from three sources: 1,549 land observations from the Defense Mapping Agency, 179 bottom gravity observations from two Naval Postgraduate School gravity surveys of Monterey Bay and 17,098 National Geodetic Survey land and ship gravity observations from the National Geophysical Data Center's Gravity CD-ROM. Digital terrain elevation data came from the Rocky Mountain Communication Inc. 3 Arc Second Digital Terrain Elevation CD-ROM. A GPS sea surface topography experiment conducted in October, 1993, had indicated an anomalous sea slope across the bay from Santa Cruz, California to Monterey, California. Comparisons between the calculated local geoid and the regional geoid for The United States, the National Geodetic Survey's GEOID93 indicated a possible explanation for the anomalous sea slope being a local slope in the geoid. Geoid, Monterey Bay, Sea surface.
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