GNSS receiver high sampling clock difference resolving method

Abstract

The invention discloses a GNSS receiver high sampling clock difference calculation method. The method comprises the following steps: performing precise single-point positioning calculation by using observation data of a low-sampling GNSS receiver to obtain a first receiver clock difference at a low-sampling moment, and a receiver position parameter, a tropospheric zenith delay parameter and an ambiguity parameter at the low-sampling moment; acquiring high-sampling parameter values corresponding to the three types of parameters at a high-sampling moment, and calculating a second receiver clockdifference at the high-sampling moment by utilizing the three types of high-sampling parameter values; and utilizing the first receiver clock difference and the second receiver clock difference to calculate the optimized high-sampling receiver clock difference. According to the method, matrix calculation is not needed, an algorithm is simple and easy to implement, a result is stable and reliable,and a calculation speed is high.

Description

technical field [0001] The invention relates to the technical field of satellite navigation and positioning, in particular to a high-sampling clock error calculation method for a GNSS receiver. Background technique [0002] The basis of GNSS (Global Navigation Satellite System) navigation and positioning is the measurement of radio signal propagation time. The basic principle of positioning is to measure the propagation time from the GNSS transmitting satellite to the receiver (which can be converted into propagation distance), and perform space resection to obtain the receiver The spatial three-dimensional position at the antenna. Since the GNSS satellite clock and the user receiver clock are difficult to maintain strict synchronization, the actual measured distance between the GNSS satellite and the receiver includes the influence of the GNSS satellite clock error and the receiver clock error. In absolute positioning, the clock error of GNSS satellites is usually correcte...

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Problems solved by technology

[0004] If you want to obtain the high-sampled receiver clock error, using the traditional method, you need to use high-frequency sampling observations to set up the observation equation when using the traditional method, and use the least square method to combine the receiver clock parameters with other unknown parameters ( Receiver position and carrier phase ambiguity parameters, etc.) to solve together, because the matrix operation, especially the matrix inversion operation involved in the GNSS precise positioning solution is proportional to the observation sampling, it will inevitably cause a sharp increase in the solution time

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