基于地面移动通信基站的差分气压测高方法

为了解决现有的卫星定位系统高程定位精度较低的问题,提出利用已发展完备的地面移动通信基站作为气压差分测量基准点的差分气压测高的方法.该方法以用户接收机附近的分布密集的地面移动通信基站为气压校正基准点,并利用移动通信基站的传输链路把相关的测量数据传送给用户,用户接收机便可以用移动通信基站观测点的高程值、气压值以及温度值,结合接收机测点处的气压值和温度值,利用高程与气压值之间的对应关系,得到用户接收机处的绝对高程值.实际试验结果表明:使用本方法后,室内高程定位精度约为1 m,室外的高程定位精度优于1 m.测高分辨率约为0.2 m,可以使GNSS(Global Navigation Satellite System)的三维位置定位精度提高约60%.本方法不仅可以弥补GNSS高程精度差的缺陷,作为高程约束参与测量方程解算还会提高水平测量精度,而且还克服了传统的气压测高精度依赖于气象站,而大多数用户接收机离气象站的距离较远,造成气压测高精度偏低的局限性.所以本方法能辅助增强卫星导航系统,提高三维定位精度,用于室内定位可以解决室内楼层的分辨问题.

Differential barometric altimetry method based on mobile phone base stations

A differential barometric altimetry was proposed for differential measurement to solve poor elevation positioning accuracy in existing satellite navigation and positioning systems by using the existing mobile phone base station as reference. The barometric measurement data from the densely distributed mobile phone base stations would be broadcasted to the adjacent user receiver. Absolute elevation value of the user receiver would be calculated by using relative formula combining the barometric pressure values and temperature values in the mobile phone base stations with the measured point. Experimental tests indicate that the indoor elevation positioning accuracy is about 1 m and the outdoor is less than 1 m. The resolution of barometric altimetry is about 0.2 m. Three-dimensional positioning accuracy of global navigation satellite system(GNSS) increase by about 60%. This method that barometric altimetry can be taken as a constraint condition involved in the solution of measurement equations can not only compensate the poor elevation positioning accuracy, also overcome the traditional barometric altimetry depending on the weather stations where are far away from most of the user receivers. Therefore, this method can assist satellite navigation system, improve the three-dimensional positioning accuracy and solve the problem of resolution upstairs and downstairs.