Single-difference parameter determination method and device for single-point positioning, equipment and medium

Abstract

The embodiments of the invention disclose a single-difference parameter determination method and device for single-point positioning, equipment and a medium. The single-difference parameter determination method comprises the steps that observation data of a target object are acquired, and a plurality of original matrix parameters for positioning the target object are calculated according to the observation data; and a plurality of positioning matrix parameters for eliminating the influence of decimal cycle deviation are calculated according to the original matrix parameters and preset calculation rules, wherein the preset calculation rules are addition and subtraction operations. According to the single-difference parameter determination method provided by the embodiments, the positioningmatrix parameters for eliminating the influence of the decimal cycle deviation can be calculated through the addition and subtraction operations, the calculation logic of the single-difference parameters is simplified, the calculation speed is accelerated, and the calculation efficiency is improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of data processing, and in particular, to a single-difference parameter determination method, device, equipment, and medium for single-point positioning. Background technique [0002] Global Navigation Satellite System (GNSS) can realize high-precision positioning measurement. When positioning based on GNSS observation data, in order to improve the solution accuracy and shorten the convergence time, the integer ambiguity needs to be fixed. Taking the precise point positioning (PPP) technology as an example, due to the influence of various residual errors, it is generally difficult to directly fix the ambiguity of the whole circumference. The usual method is to fix the ambiguity of the wide lane first, and then use the fixed The wide-lane ambiguity constrains the floating-point ambiguity, and then fixes the floating-point ambiguity constrained by the wide-lane ambiguity. [0003] At present, the...

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Problems solved by technology

[0004] In the prior art, the calculated wide-lane ambiguity N w , wide-lane ambiguity N w The covariance matrix Q of nw , and N w and N 1 The cross-covariance matrix Q n1nw The algorithm and calculation of each parameter after the single difference calculation: sdN 1 , sdN w 、sdQ n1 、sdQ nw 、sdQ n1nw The algorithm and the algorithm for obtaining the fixed narrow lane ambiguity both include multiple matrix multiplication calculations. It can be seen that there are many matrix multiplication operations in the prior art. When the program runs on a device with poor hardware equipment, There will be performance problems, and it may happen that the observation data of one epoch cannot be solved within 1 second, so using the above algorithm may not be able to meet the actual measurement work requirements

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