基于伪码测距的弹射试验测试系统

提出了一套基于伪码测距的弹射试验测试系统设计方案.将GPS定位和精密授时与伪码测距相结合用于弹射试验的测试,在保证测试精度前提下,提高了数据更新率,适应了弹射试验高动态测试的要求.机载测站与地面多个基站构成测试数据链路,采用伪码测距获取原始数据,测试系统的时标和空间参考坐标由基站的GPS模块进行自动标定.事后解算处理获得定位数据.测距定位的精度受测试系统几何布局的影响,详细分析了在伪码测距误差既定的情况下,测试基站的布局对测试定位精度的影响,对测场范围内的测量误差分布进行了仿真计算,并根据误差分布给出了合理的测试基站布局.

Design for ejection test system based on PN code ranging

A scheme for ejection test system based on pseudo-random nosie(PN) code ranging was designed. In combination with GPS position, timing and PN code ranging, the update rate of the data was increased to adapt the requirements of high dynamic on condition that the accuracy of the test was guaranteed. The testing data link was constructed by an airborne test station and some land base stations. Raw data were obtained from PN code ranging. The references of the time and space were auto-calibrated by GPS module. The position data were obtained by post process. Position accuracy can be influenced by geometry layout of the test system. This paper analyzed the effect of the layout of test base-stations on the position accuracy. The distribution of the measure error was made simulation calculation in the range of test land. Rational layout of test base-station was presented in accordance with the error distribution.