三颗导航星二维测速解算模型及其误差分析和精度计算

The calculating model of planar measured velocity by three navigation satellites and its error analyse and its calculation of precision

给出了用户接收机只收到三颗导航卫星信号时的二维测速解算模型及其解算方法,并做了模拟解算。从改变测速参数数值的多次解算结果表明,该解算模型及其解算方法正确。文中对该解算模型用于工程中的测速误差做了分析,计算了测速精度,计算结果表明解算模型及其解算方法能够满足工程应用,并阐述了导航接收机具有三颗导航星二维测速功能的必要性。

Describes the calculating model of planar velocity and calculating method by only receiving three navigation satellites＇ signals, and does simulation calculation. The many calculating results show that calculating model and method are right by changing the parameter value of measured velocity. The paper analyzes the error of measured velocity for the calculating model applied to project, and calculates its precision. The calculating result shows that calculating model and method can satisfy its application to project, and expatiates that receiver for navigation is necessary with the function of planar measured velocity by three navigation satellites.