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http://dx.doi.org/10.5467/JKESS.2007.28.7.825

Precise Terrain Torrection for Gravity Measurement Considering the Earth's Curvature  

Choi, Kwang-Sun (Department of Earth Science Education, Busan National University)
Lee, Young-Cheol (Department of Earth Science Education, Busan National University)
Lim, Mu-Taek (Geology & Geoinformation Division, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Journal of the Korean earth science society / v.28, no.7, 2007 , pp. 825-837 More about this Journal
Abstract
The researchers compiled two sets of digital terrain data released by NORI (National Oceanographic Research Institute, Korea) and NIMA (National Imagery and Mapping Agency, USA) respectively and analyzed a new set of $3"{\times}3"$ gridded terrain data in order to calculate terrain correction value in gravity in and around the Korean Peninsula. Using this new set of terrain data, the researchers developed an effective algorithm to calculate precise terrain correction value in gravity considering Earth's curvature and coded a fortran program to evaluate terrain correction value covering the surface of which the radius reaches up to 166.735 km. The researchers also calculated terrain correction value over the southern part of Korea. According to the statistics of terrain correction value calculated in and around the Korean Peninsula up to 166.735 km of surface radius, the maximum value soars to 56.508 mGal and the mean value is 4.539 mGal.
Keywords
digital terrain data; terrain correction; gravity; algorithm;
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