摘要
对电阻率异常进行地形改正,通常采用解析法、有限元法等,这些方法进行地改计算繁琐复杂,而用三阶多项式法,应用袖珍式PC-1500计算机进行起伏地形视电阻率计算、绘图、地形改正,其方法简单、直观、快速。同时在精度上,其计算结果与Vactor-90微型计算机计算结果相比,最大相对误差小于5.3％。这对于野外工作来说,它足以满足野外的精度要求。
Finite-element technique and analytical formula is used generally to topographic correction for apparent resistivity. It is very complex to cul culate topographic anomaly in these methods, but simple, direct sensible and fast for culeulating topographic apparent resistivity, drawing sketch and correcting topographic effect with pC-1500 pocket computer according to the method of third order polynomial. As the result a maximum relative error is less than 5.3% compared to that of finite-element technique with Vector-9000 microcomputer. The result is enough to field precision.
