Downward continuation of airborne gravity data
نویسنده
چکیده
$EVWUDFW With airborne gravimetry routinely reaching accuracies of 1-2 mGal at 5-10 km resolution, it is a challenge to perform a reliable downward continuation of the gravity anomalies at altitude. Airborne gravimetry is especially suited for geoid determination in mountainous and polar regions, due to the random, alias-free sampling of the terrain, relative to typical surface surveys. In the paper different operational methods based on collocation and FFT are outlined, and applied to downward continuation of surface data merging of airborne surveys over Greenland and Svalbard, ranging in survey altitudes from 150 m to 4100 m.
منابع مشابه
Evaluation and Comparison of the Processing Methods of Airborne Gravimetry Concerning the Errors Effects on Downward Continuation Results: Case Studies in Louisiana (USA) and the Tibetan Plateau (China)
Gravity data gaps in mountainous areas are nowadays often filled in with the data from airborne gravity surveys. Because of the errors caused by the airborne gravimeter sensors, and because of rough flight conditions, such errors cannot be completely eliminated. The precision of the gravity disturbances generated by the airborne gravimetry is around 3-5 mgal. A major obstacle in using airborne ...
متن کاملررسی شرط پیکارد در مسأله انتقال به سمت پائین در تعیین ژئوئید بدون استفاده از روش استوکس
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