DEM网格间距及校正半径对重力地形校正的影响
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张菲菲, 王万银, 李倩, 王林, 马静
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Influence of DEM grid spacing and correction radius on terrain correction in gravity exploration
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ZHANG Fei-Fei, WANG Wan-Yin, LI Qian, WANG Lin, MA Jing
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表3 不同网格间距地形数据计算结果对比(丘陵)
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Table 3 Compare of calculate result of terrain correction values based on different grid spacing (hill area)
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校正范围/m | 均方根误差/(10-5m·s-2) | 10 m网格 间距 | 25 m网格 间距 | 50 m网格 间距 | 100 m网格 间距 | 0~20 | 0.010451 | | | | 20~50 | 0.002317 | | | | 50~100 | 0.001187 | 0.007793 | 0.020051 | | 100~200 | 0.000566 | 0.003219 | 0.007084 | 0.015905 | 200~500 | 0.000335 | 0.001906 | 0.004584 | 0.009157 | 500~1000 | 9.210×10-5 | 0.000495 | 0.001205 | 0.002512 | 1000~1500 | 3.187×10-5 | 0.000156 | 0.000386 | 0.000798 | 1500~2000 | 1.754×10-5 | 7.771×10-5 | 0.000205 | 0.000424 | 2000~3000 | 2.100×10-5 | 8.392×10-5 | 0.00023 | 0.000517 | 3000~5000 | 2.113×10-5 | 9.799×10-5 | 0.000283 | 0.000652 | 5000~10000 | 1.555×10-5 | 8.894×10-5 | 0.000271 | 0.000645 | 10000~15000 | | | 6.301×10-5 | 0.000211 | 15000~20000 | | | 3.157×10-5 | 0.000112 |
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