因此要提高无线电定位的精度，就必须进行电波折射修正。
The radio wave refraction correction for improving the accuracy of radio location in necessary.
因此要提高GPS的定位导航精度，就必须进行电波折射修正。
The radio wave refraction correction for improving the accuracy of GPS navigation and location is necessary.
一般常用电波折射误差修正方法存在计算复杂且不具有实时性缺陷。
Radiowave refractive errors correction methods have defect of computing complexity and no real time in common use.
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