室内GPS利用测量的水平角和垂直角来定位,其测角误差直接影响到系统的综合测量精度,根据室内GPS的测量原理及室内GPS角度校准的技术要求,结合精密转台、同轴调整装置和竖轴激光导轨,研制了室内GPS发射器角度校准装置,并对其测角精度进行分析计算和实验验证。实验结果表明,装置的水平角测量不确定度为1.5″,俯仰角测量不确定度为0.9″,并能够同时实现室内GPS的俯仰角及水平角的校准。

Indoor GPS (iGPS) is a newly developed laser based measuring system for large scale measurement. Since the synthesis uncertainties of the indoor GPS system provided by a triangulation network propagate from the uncertainties in the individual angular measurements,  the first step in assessing the accuracy of the system is to determine the uncertainties of the horizontal angle and vertical angle. According to the indoor GPS measurement principle and the requirements of the indoor GPS angle calibration technology,combined with precision turntable, laser coaxial adjustment device and the vertical axis, the calibration device is developed. Measuring angle precision are calculated and analyzed. Experiments are then carried out to determine the actual uncertainty of the horizontal and vertical angle. Results show that horizontal angle measurement uncertainty is 1.5″, vertical angle measurement uncertainty is 0.9″, which satisfy the technical index.