顾及基准点稳定性的高崩溃污染率坐标转换模型

Coordinate Transformation Model of High Breakdown Contamination Rate with the Reference Points

针对矿区基准点布设时间较早,容易发生位移的特点,为确保高精度GPS控制网坐标系统转换后的质量,克服基准点位移对转换成果的影响,提出顾及基准点位移的高崩溃污染率抗差估计理论,建立坐标转换参数的估计模型和转换后GPS网的质量评价体系。对兖州某矿区进行应用,结果表明,该模型可以选择分布合理且稳定的基准点,很好地保留了GPS技术高精度的特点,并为矿区建立了高精度的坐标基准。

According to the characteristics of the reference points in mining areas which were laid at early time and are easy to shift,the theory of high breakdown contamination rate for the coordinate transformation with the reference points＇ displacements is proposed to ensure the quality of coordinate system transformation for the high precision GPS control network and eliminate the impact of the displacements existed in the transformation reference points on the transformed results.Then the estimation model for the coordinate transformation parameters and the quality evaluation system for transformed GPS network are established.Taking a Yanzhou mining area for example,the results show that the model can choose a reasonable and stable reference points and remain the high precision characteristics of GPS technology,also provide a high precision coordinate datum for the mining area.