酒泉盆地GPS基准控制网的建立及似大地水准面精化研究

为改善GPS测量在酒泉盆地油气勘探应用中的技术条件，在盆地内建立与国家96A级GPS网基准相一致的区域性高精度GPS网，并在测网控制范围内进行似大地水准面精化研究，精确求定网区内似大地水准面，是最有效的技术途径。本文阐述了酒泉盆地GPS基准控制网及似大地水准面精化研究项目及实施的基本情况，并分析论证GPS网的建网方案、似大地水准面精化方案、数据处理方案，对项目成果精度进行检合分析，最终得出酒泉盆地所建立的B、C两级GPS基准控制网，其精度优于国家B级网和C级网；似大地水准面精化研究确定出酒泉盆地似大地水准面误差在厘米级。

Establishment of GPS fiducial control net and optimum research on pseudogeoid in Jiouquan basin

In order to improve the technical condition of using GPS measurement for oil-gas exploration in Jiouquan basin, building the regional high-precision GPS net consistent with state's 96 grade A GPS net criterion,optimum researching on pseudo-geoid in a net controlled scope and precisely evaluating the pseu-do-geoid in the net region are the most effective way. The paper elaborated the project of optimum researching on GPS fiducial control net and pseudo-geoid in Jiouquan basin and basic circumstances of operation, analyzed the program of setting up the net of GPS net,optimum plan of pseudo-geoid and data processing program and examined the precision of project results,finally,the grade B and C GPS fiducial control net built in Jiouquan basin has been obtained, which the precision is superior to state' s grade Band grade C net; the defined errors of pseudo-geoid in Jiouquan basin by optimum research on pseudo-geoid is in centimeter level.