The Effeect of DTM Resolution in Topographical Corrections on Gravity

محل انتشار: همایش ژئوماتیک 84
سال انتشار: 1384
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 2,345

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تاریخ نمایه سازی: 27 آذر 1384

چکیده مقاله:

The one gravity equipotential surface of particular interest is that which best approximates the ( mean) sea level over the whole earth. It is called geoid ( Vanicek & Krakiwsky, 1986) . It is most natural repesentation of the earth shape thus the knowledge of the geoid is important in geodesy. It has very importmant role for determination of orthometric heights from obtained heights by GPS, i.e., ellipsoidal heights. The use of Stokes is fromula in gravimetric geoid determination requires that the gravity anomalies represent boundary values on the geoid, this means that the measured gravity ( usully taken on the Earth surface) must be reduced to the geoid and there mist be no masses outside the geoid(Heiskanen and Moritz, 1967).


Morteza Sadighi

National Cartographic Center (IRAN) Research Institute of NCC K.N Toosi University