【摘要】 硬件延迟的确定与所采用的电离层误差修正方法密切相关,其方法的准确度直接影响到硬件延迟的估算精度。本文综合利用广播星历所提供的Klobuchar模型系数以及双频载波与码观测量修正电离层误差,修正过程中绕开了整周模糊度的计算,给出了一种实时计算GPS接收机硬件延迟的算法,提高了实时电离层修正的精度,通过实例反算卫星硬件的延迟与广播星历中的TGD一致,验证了算法的有效性。更多还原

【Abstract】 The determination of GPS hardware delay is closely related to the ionosphere error correction methods,and the accuracy of the method directly affects the estimation of the hardware delay.This paper presents a real time algorithm to calculate GPS receiver hardware delay,combining the coefficient of the Klobuchar model in broadcast ephemeris with dual-frequency carrier and code observation to correct ionosphere errors.The process of correction bypasses the calculation of the integer ambiguity. This algorithm overcomes the influence of the integer ambiguity,and improves the real-time ionosphere correction precision.The effectiveness of the algorithm is verified by an example in which the results of calculating the timing group delay( TGD) are consistent with the TGD in GPS broadcast ephemeris.更多还原