Band-limited Direct Topographical Effects of Horizontal Components in Airborne Vector Gravimetry

doi:10.13485/j.cnki.11-2089.2014.0144

Abstract

Abstract:

Based on the series-expanded expression of Helmert’s 2nd condensation method, formulae of band-limited direct topographical effect of horizontal components in airborne vector gravimetry are deduced independently. Using a digital elevation model, direct topographical effects of the horizontal components are computed based on the analytical kernel along selected flight lines in western area of China with flight height of 4000m, these values are processed by low-pass filter and compared to values computed by the band-limited formulae. It turns out that both topographical effects have a good consistence, and the band-limted formulae can be used for topography reduction for horizontal components of airborne vector gravimetry.

Key words: airborne vector gravimetry, horizontal components, band-limited direct topographical effect, Helmert’s 2nd condensation method

CLC Number:

P207

ZHOU Boyang LUO Zhicai NING Jinsheng ZHONG Bo. Band-limited Direct Topographical Effects of Horizontal Components in Airborne Vector Gravimetry[J]. Acta Geodaetica et Cartographica Sinica, 2014, 43(10): 1019-1024.

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