以WGS84参考椭球为基准,建立地球表面正常重力公式.利用该公式可以直接计算地球表面每个测点的正常重力场,从而计算出测点所在位置的重力异常,避免重力外部校正过程中存在的高程起算面误差、重力正常椭球与参考椭球不一致引起的纬度误差、中间层密度不合理及地形校正破坏区域地质构造格架等问题.对实测重力数据的试算结果表明,利用建立的正常重力公式所计算的重力异常较之布格重力异常对构造的反映更加清晰,更能够发现细小的断层及岩体.%Taking WGS84 ellipsoid as the datum to create a normal gravity fomula of the earth's surface, the normal gravity of every survey points in the earth surface can be directly computed by the formula and the gravity abnormal to the survey points' location could be calculated directly so that the problmes in gravity external correction can be avoided. The results of the observed gravity data show that compared with Bouguer gravity anomaly, the gravity anomaly eaculated by the formula could reflect information of structure much clearly, and some small faults and rocks could be found easily in the gravity anomaly.
展开▼
