Survey and Accuracy Analysis of GPS Control Network of the Trunk Stream of the Yellow River

The article chiefly discusses the field data collection and test of GPS control network of the trunk stream of the Yellow River. In the course of data processing and analysis,it makes base solution in single interval and long term repeating comparison,makes an analysis of the combining adjustment and errors of level Ⅰ and Level Ⅱ, and uses IGS acucrate star calendar and peripheric benchmark station technology. It suggests that the same type of GPS receiver be used while making barge size control network survey.