GPS优化建网及基线处理质量控制

The Optimization of GPS Control Network and the Quality Control of Baseline Processing

结合近几年石油物探测量应用GPS建网的工程实际,针对当前GPS布网和基线处理中存在的不足,提出科学施工和提高质量的较为可行的思路:科学踏勘、进行卫星可见性预报、合理调度、优化设计、保证精度、提高效率。通过分析影响基线解算的因素,给出结论:在基线解算中,为确保起算点坐标的精度,观测时保证必要、足够但不追求过长的观测时间(在观测条件良好时可以适当缩短观测时间),必要数目且质量较高的卫星,好的观测环境,若存在长基线要导入精密星历,都可确保获得较高质量的测量成果。GPS优化布网的方法和基线质量控制的思路对指导实际生产有着一定的借鉴和推广意义。

Combined with the practical application of GPS control network in oil geophysical survey in recent years,this paper puts forward feasible solutions to scientific construction and quality improving in GPS control network construction involving scientific exploration,satellite visibility prediction,reasonable dispatch,design optimization,precision ensuring and efficiency improvement,in light of the shortcomings of the current GPS network construction and baseline processing.Based on the analysis of the factors affecting baseline solution,the authors come to the conclusion that surveying result of high quality can be obtained through ensuring the accuracy of the starting points coordinates,necessary and adequate but not particularly long observation time,shortened observation time in good conditions,satellites of necessary number and high quality,good observation environment and the import of precise ephemeris in case of long baseline.The method of optimizing GPS control network and baseline quality control is of certain significance in reference and promotion in guiding production practice.