GPS跨河水准在南水北调穿黄工程中的应用研究

GPS测量法作为一种新的跨河测量技术，越来越受关注。但其在大型工程中如何保证高精度测量的实施，实现精度可靠，仍有许多值得探讨、研究的方面。本文通过在南水北调穿黄工程的宽广、平坦河段采用GPS跨河水准测量实施高等级控制网的应用研究，解决了GPS跨河水准的关键技术及作业要点，实现了与直接精密水准测量的无缝对接，大大提高了工作效率。

Application of GPS Across-the-River Level in Cross Yellow River Project of the South-to-North Water Diversion

As a new cross-the river measuring technology, GPS measuring method has attracted more and more attention. But how to achieve high accuracy in large project is still worth studying. By using GPS cross-the-river level measurement in the broad and flat reaches of Cross Yellow River project of the south-to-north water diversion, key technology and operation of GPS cross-the-river level has been solved and summarised, seamless joint with precise measuring method has been achieved and working efficiency has been greatly increased.