利用GPS伪距导出的多普勒频移测速

Velocity Determination Using Doppler Shift Derived from GPS Pseudorange Observations

推导了利用伪距观测值获取多普勒频移的公式,并利用导出的多普勒频移来确定载体的速度。实测数据表明,利用伪距导出的多普勒频移测速,可以达到dm/s级的水平。在没有原始多普勒观测值或者相位观测出现了频繁周跳的情况下,可以利用伪距导出的多普勒频移获得载体概略的速度信息。

The formula of deriving Doppler shift of GPS signals from pseudorange observations is presented and used to get the velocity of receiver.We find that the precision of velocity determination using pseudorange-derived Doppler shift is at the level of dm/s.This method of velocity determination is quite useful when the original Doppler shift is absent or the carrier phase observations suffer from frequent cycle slips.