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Satellite navigation positioning error correction method and device considering hardware inter-frequency difference

A satellite navigation and positioning error technology, which is applied to satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve problems that cannot be widely used, and achieve the effects of correcting positioning errors, improving fitting accuracy, and improving positioning accuracy

Inactive Publication Date: 2021-10-29
CHANGSHA UNIVERSITY
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Problems solved by technology

However, for Wide Area Differential GPS (WADGPS) and Wide Area Augmentation System (WAAS), since most users use single-frequency receivers, they cannot be widely used

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  • Satellite navigation positioning error correction method and device considering hardware inter-frequency difference
  • Satellite navigation positioning error correction method and device considering hardware inter-frequency difference
  • Satellite navigation positioning error correction method and device considering hardware inter-frequency difference

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Embodiment Construction

[0060] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0061] In one embodiment, such as figure 1 As shown, a satellite navigation positioning error correction method taking into account the hardware frequency difference, the method includes the following steps:

[0062] Step S100: Obtain the calculation parameters of the dual-frequency pseudo-range measurement value, wherein the calculation parameters of the dual-frequency pseudo-range measurement value include the speed of light, the measurement noise influence value, the real geometric distance between the satellite and the receiver, and the offset between the receiver clock and the system clock. shift, the offset between the satellite clock and the system clock, the delay value of the first frequency satellite signal passing through the ionospher...

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Abstract

The invention discloses a satellite navigation positioning error correction method and device taking hardware inter-frequency difference into account. The method comprises the following steps: acquiring a double-frequency pseudo-range measurement value calculation parameter; according to the dual-frequency pseudo-range measurement value calculation parameter, calculating pseudo-range measurement values under the first frequency satellite signal and the second frequency satellite signal, and according to the pseudo-range measurement values under the first frequency satellite signal and the second frequency satellite signal, acquiring a dual-frequency pseudo-range measurement value difference value; obtaining a dual-frequency carrier phase, obtaining a carrier-smoothed pseudo-range measurement value according to the dual-frequency carrier phase smoothed dual-frequency pseudo-range measurement value difference value, and replacing the dual-frequency pseudo-range measurement value difference value with the carrier-smoothed pseudo-range measurement value to obtain an ionosphere model equation; simulating the total electron content in the local zenith direction according to a preset polynomial model, and fitting the ionosphere model equation by using a least square technology to obtain an inter-frequency deviation value. And the difference value of the double-frequency pseudo-range measurement values is smoothed by the high-precision double-frequency carrier phase measurement value, so the positioning error is effectively corrected, and the positioning precision is improved.

Description

technical field [0001] The invention belongs to the field of satellite navigation receiver equipment, and in particular relates to a satellite navigation positioning error correction method and device in consideration of hardware frequency difference. Background technique [0002] In the process of satellite signal propagation, it has to pass through the atmospheric ionosphere, resulting in a delay effect. Compared with other errors such as clock error, tropospheric delay, multipath effect, and orbit error, this effect has a greater impact (up to 45m). The main error in the system, so how to correct the delay caused by the satellite signal passing through the ionosphere is one of the important issues to solve the positioning accuracy. [0003] Using the ionospheric dispersion effect to eliminate the ionospheric delay through dual-frequency correction can usually achieve very good results, and in the most unfavorable case, the residual error is only a few centimeters (that is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/43G01S19/07
CPCG01S19/43G01S19/072
Inventor 吴鹏仝海波冯璐黄雅静陈雨莺肖学美颜锦辉刘威
Owner CHANGSHA UNIVERSITY
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