基于光电经纬仪交会测量提高GPS精度的研究

Improvement of GPS Accuracy Based on Intersection Measurement of Opto electronic Theodolite

摘要:

针对单频C/A码GPS接收机精度不高的问题，提出一种基于光电经纬仪双站交会测量提高GPS精度的方法。在直角发射坐标系中，利用光电经纬仪测量得到目标的方位角与俯仰角，通过双站交会测量中常用的“水平投影法 L公式”计算飞行物的轨迹，与飞行物实际轨迹对比，求得双站交会测量的误差。GPS和光电经纬仪测量同一目标，将两种方法的测量结果对比，以交会测量精度作为GPS的测量基准，与GPS提供的坐标相比对，求得GPS的测量误差。GPS测量其他位置坐标时，测量结果去除求得的测量误差，得到更精确的坐标。

Abstract:

According to the problem of low accuracy of single frequency C/A code GPS receiver, a method was presented to improve the GPS accuracy by combining GPS and opto electronic theodolite. In rectangular emission coordinate system, the opto electronic theodolite was used to measure the target azimuth and pitching angle, and the commonly used "horizontal projection method—L formula" was applied to calculate the trajectory of flying object. By comparing with the actual trajectory, double station intersection measurement error was obtained. Using GPS and opto electronic theodolite to measure the same target, the measurement results of the two methods were compared. Then GPS measurement error can be obtained by using intersection measurement precision as GPS measurement datum and the comparison with the coordinates provided by GPS. When using GPS to measure other coordinates, more accurate coordinates can be obtained after removing the measurement error.