To determine the relative positions of them, the GPS technique, traditional direction and range survey, and precise leveling are adopted in this paper.
本文采用GPS技术及常规的方向、距离和精密水准测量对三个站进行了空间归心测量。
Theoretic study and experiment show that the new method solves the problem which simplex GPS leveling can't connect different height systems and so it is an effectively precise method.
理论研究和实验表明，新方法克服了单纯GPS水准无法连接不同高程系统的困难，是一种有效的高精度方法。
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