ISSN:
1432-1394
Keywords:
Key words: Direct effect – Helmert condensation – Spherical harmonics – Geoid
Source:
Springer Online Journal Archives 1860-2000
Topics:
Architecture, Civil Engineering, Surveying
Notes:
Abstract. The direct topographical correction is composed of both local effects and long-wavelength contributions. This implies that the classical integral formula for determining the direct effect may have some numerical problems in representing these different signals. On the other hand, a representation by a set of harmonic coefficients of the topography to, say, degree and order 360 will omit significant short-wavelength signals. A new formula is derived by combining the classical formula and a set of spherical harmonics. Finally, the results of this solution are compared with the Moritz topographical correction in a test area.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s001900000110
