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针对某些条件下GPS和北斗可能会由于受干扰而不可用的问题,提出一种双伪卫星辅助的惯导误差校正新方法。在伪卫星数目只有两颗时,该方法仍可利用伪卫星的伪距测量序列将惯导的位置误差和接收机钟差估计出来。仿真结果表明,在两颗伪卫星处于载体异侧的条件下,如果惯导的初始位置误差为280m,则对钟差的估计精度优于110ns(1σ),对惯导位置误差的估计精度优于70m(1σ)。
Aiming at the problem that GPS and BeiDou may not be available due to interference under some conditions, a new method of double Pseudo-satellite-aided inertial error correction is proposed. When there are only two pseudo-satellites, the method can still estimate the position error of the inertial navigation and the clock error of the receiver by using the pseudo-satellites pseudo-range measurement sequence. The simulation results show that if the initial position error of inertial navigation is 280m under the condition that the two pseudo-satellites are on the opposite side of the carrier, the estimation accuracy of clock error is better than 110ns (1σ) At 70m (1σ).