摘要
低纬度地区（尤其是磁赤道附近）磁场化极是长期以来没有很好解决的问题。这里提出的方法只时常规化极稍加改进，通过时化极因子的频点偏移，避开无界点，使化极结果改善很大，甚至在赤道上也可以化极。它既有很高的精度，又因仍是在频率域内进行，故计算方便、快速。
The problem of reduction to the pole at low latitudes has not been well solved for a long time. The technique presented here is just as like the conventional method but with frequencv point shift. Which makes the factor of reduction to the pole avoiding the infinite point, and it provides a great improvment in the reduction , even in magnetic equator area. The method , which is convenient and fast with high precise , is very suitable for the transformation of large data area. The test shows these properties.
基金
国家自然科学基金
