地球坐标系内的磁场转换方法

为了满足卫星磁测资料解释的需要,作者提出了地球坐标系内的磁场转换方法,包括:（1）非同一球面上磁场换算同一球面上磁场的“曲化平”方法;（2）不同球面磁场互换的“延拓”方法;（3）由测量方向与磁化方向均与基本地磁场一致的场T,换算测量与磁化方向均指向地心的场Z,的“化向地磁极”方法。所有方法均建立在球谐分析的基础上,且均可以应用于地球表面的局部区域。

CONVERSION METHOOS OF THE MAGSAT ANOMALY IN SPHERICAL COORDINATE SYSTEM

In order to interpret the magsat data, the authors advanced conversion methods of the magsat anomaly in spherical coordinate system; CD the "Camber to level" method that can be used to calculate the magsat anomaly of spherical surface from the magssat anomaly on servey surface; (2) the "Analytical continuation" method that can be used in conversion of the magsat anomaly on different spherical surfaces; (3) the "Reduce to the Earth's pole" method that can be used to calculate the magsat anomaly which has survey direction and magnetization direction to point to the earth's centre from the magsat anomaly which has survey direction and magnetization direction to parallel with the field direction of the earth's dipole. These methods based on spherical harmonic analysis theory can be also used in the partial earth's surface.