The direct effect and downward continuation correction of atmospheric masses in gravimetric geoid determination
Peer reviewed, Journal article
Accepted version
Permanent lenke
https://hdl.handle.net/11250/3064779Utgivelsesdato
2004Metadata
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Originalversjon
Bollettino di Geodesia e Scienze Affini. 2004, 63 (1), 1-11.Sammendrag
A new procedure to the direct atmospheric gravity effect in connection with Stokes's integral formula was presented by Nahavandchi (2002). This formula was derived by combining the local contributions of the effect of atmospheric masses, computed from a detailed Digital Terrain Model (DTM) and a set of spherical harmonics to account for the global contributions. This formula is valid for a point on the geoid, which indicates this fact that the direct effect and the effect of analytical continuation of gravity anomalies to sea level due to the atmospheric masses are combined into the so-called direct atmospheric effect. These two terms are studied here and a new strategy for the effect of atmospheric masses in geoid computations is presented. This strategy has been investigated over a test area. The direct effect and downward continuation correction of atmospheric masses in gravimetric geoid determination