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Detailed Reference Information |
Roman, D.R., Csathó, B., Jezek, K.C., Thomas, R.H., Krabill, W.B., von Frese, R.R.B. and Forsberg, R. (1997). A comparison of geoid undulations for west central Greenland. Journal of Geophysical Research 102: doi: 10.1029/96JB02697. issn: 0148-0227. |
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The accuracy of a new local gravity field model, GEOID94A, is examined at a site on the western Greenland ice sheet. The model, developed by the Danish National Survey and Cadastre, incorporates several new gravity data sets including an extensive amount of airborne gravity data. Model-derived geoid undulations were compared to independently determined undulations found by differencing the elevations from Global Positioning System controlled airborne laser altimetry and optical leveling surveys. Differences between the two sets of undulations were less than +/-6 cm RMS. The comparison improved (+/-5 cm RMS) when GEOID94A undulations were adjusted by local gravity observations also acquired at the site. Our comparisons demonstrate that GEOID94A adequately models the long to intermediate wavelengths of the gravity field. We conclude that GEOID94A constitutes a reliable reference model for studies of Greenland's gravity field.¿ 1997 American Geophysical Union |
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Abstract |
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Keywords
Geodesy and Gravity, Regional and global gravity anomalies and Earth structure, Geodesy and Gravity, Reference systems, Geodesy and Gravity, Control surveys, Exploration Geophysics, Gravity methods |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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