A Multipath Correction Method Based on Spatial Repeatability
A multi-path, repetitive technology, applied in the field of satellite positioning and navigation, can solve the problems of promotion limitations and achieve the effect of broad application prospects
Active Publication Date: 2022-07-29
EAST CHINA NORMAL UNIV
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Problems solved by technology
[0003] At present, the main problem of the multipath correction method based on spatial repeatability is that it is only applicable to the common clock dual-antenna single-difference mode, and there are restrictions on the receiver equipment and the length of the baseline, so there are limitations in promotion
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Embodiment 1
[0049] In order to verify the technical effect of the present invention, a static short-baseline multipath correction experiment was carried out. The base station used the Trimble R9 receiver, and the rover used the Trimble BD982 receiver. From February 19, 2019 to February 20, a total of two days were observed. time, the specific implementation is carried out according to the following steps:
[0050] Step 1: Double-difference short baseline solution and residual acquisition, this step is calculated using the observation data on February 19.
[0051] (1) Establish a double-difference short baseline model
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The invention discloses a multi-path correction method based on spatial repeatability, which is characterized by solving double-difference short baselines and obtaining residuals, generating multi-path sky maps based on the homodyne method, and realizing multi-path real-time correction. The steps of establishing a double-difference short-baseline model, solving the short-baseline and obtaining residuals, calculating multi-path values, generating multi-path sky maps and multi-path real-time correction. Compared with the prior art, the present invention is applicable to a wider range of double-difference short baseline modes, and is also applicable to pseudorange, carrier phase observation, and dynamic scenes with unchanged static and multipath environments, and has broad application prospects.
Description
technical field [0001] The invention relates to the technical field of satellite positioning and navigation, in particular to a multi-path correction method based on spatial repeatability. Background technique [0002] Multi-path error is an unresolved key error in high-precision positioning. The multi-path correction method based on spatial repeatability is not only suitable for static mode but also for dynamic mode with unchanged multi-path environment. Compared with post-processing multi-path correction methods and The real-time sidereal filtering method has wider application scenarios. [0003] At present, the main problem of the multi-path correction method based on spatial repeatability is that it is only suitable for the single-difference mode of the two antennas with the same clock, and the receiver equipment and the baseline length are limited, so it has limitations in promotion. SUMMARY OF THE INVENTION [0004] The purpose of the present invention is to provide...
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IPC IPC(8): G01S19/41
CPCG01S19/41
Inventor 陈雯王梽人董雅璇董大南余超彭宇刘敏
Owner EAST CHINA NORMAL UNIV