Physics
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984georl..11..821e&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 11, Sept. 1984, p. 821-824.
Physics
5
Geoids, Global Positioning System, Gravimetry, Gravity Anomalies, Collocation, Ellipsoids, Least Squares Method, Numerical Integration
Scientific paper
Ellipsoidal height differences have been determined for 13 station pairs in the central Ohio region using measurements made with the Global Positioning System. This information was used to compute geoid undulation differences based on known orthometric heights. These differences were compared to gravimetrically-computed undulations (using a Stokes integration procedure, and least squares collocation having an internal r.m.s. agreement of plus or minus 1 cm in undulation differences). The two sets of undulation differences have an r.m.s. discrepancy of plus or minus 5 cm while the average station separation is of the order of 14 km. This good agreement suggests that gravimetric data can be used to compute accurate geoid undulation differences that can be used to convert ellipsoidal height differences obtained from GPS to orthometric height differences.
Engelis T.
Rapp Richard H.
Tscherning Carl Christian
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