GNSS (Global Navigation Satellite System) receiver observation value precision calculation method based on zero baseline single-difference residual error

Abstract

The invention provides a GNSS (Global Navigation Satellite System) receiver observation value precision calculation method based on zero-baseline single-difference residual error, which comprises the following steps of: respectively modeling from a carrier phase observation value and a pseudo-range observation value, acquiring a single-difference observation value between two receivers, respectively constructing a carrier phase single-difference observation equation set and a pseudo-range single-difference observation equation set, and calculating the precision of the observation value of the GNSS receiver based on zero-baseline single-difference residual error. And solving a fixed solution of the integer ambiguity through a decoupling mode, further solving the least square estimation of the carrier phase single-difference observation matrix and the pseudo-range single-difference observation matrix, and carrying out statistics on the carrier phase observation value precision and the pseudo-range observation value precision of a single receiver.

Description

technical field [0001] The invention relates to the technical field of satellite navigation and positioning equipment, in particular to a method for calculating the precision of GNSS receiver observation values ​​based on zero-baseline single-difference residuals. Background technique [0002] The observation accuracy of the GNSS receiver refers to the statistical value of the observation noise, which is represented by the RMS (root mean square error) of the noise. At present, there are two calculation methods for the observation accuracy. The method of recovering single-difference residuals from double-difference residuals is to restore the single-difference residuals of the corresponding satellites from each double-difference residual in each epoch, and then analyze the error characteristics of each satellite observation value according to the single-difference residual sequence and precision, but this method is related to the number of observation epochs. The solution of ...

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Problems solved by technology

[0002] The observation accuracy of the GNSS receiver refers to the statistical value of the observation noise, which is represented by the RMS (root mean square error) of the noise. At present, there are two calculation methods for the observation accuracy. The method of recovering single-difference residuals from double-difference residuals is to restore the single-difference residuals of the corresponding satellites from each double-difference residual in each epoch, and then analyze the error characteristics of each satellite observation value according to the single-difference residual sequence and precision, but this method is related to the number of observation epochs. The solution of double-difference ambiguity also involves the position solution of the station. The accuracy of the observation value will be affected by the satellite orbit error, and the impact on the baseline solution result is about 0.05mm ; Another method is to list the single-difference equation, convert the single-difference to double-difference, use the LAMBDA algorithm to fix the double-difference ambiguity, solve the three coordinate parameters and the mixed term of the ambiguity and the clock difference, and finally calculate the single-difference residual Poor, need to rely on satellite ephemeris to participate in the calculation

The above methods all have the problem of unsatisfactory calculation accuracy. Therefore, it is necessary to propose a different method for calculating the accuracy of GNSS receiver observations based on zero-baseline single-difference residuals.

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