Tide gauge station vertical reference detection method using GNSS buoys

A detection method and a buoy technology, which are applied in the direction of measuring devices, radio wave measurement systems, satellite radio beacon positioning systems, etc., can solve the problems that cannot take into account the displacement error of the datum point of the tide gauge station, the results of leveling continuous measurement cannot be unified, and the tide gauge The station lacks the national 85 elevation system and other issues

Active Publication Date: 2021-04-30
THE FIRST INST OF OCEANOGRAPHY SOA
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Problems solved by technology

[0003] However, the disadvantages of this method are first: the workload and economic cost of leveling survey are large, and the leveling survey in areas with complex terrain is difficult, and the error accumulation is large; second: the displacement error of the datum point of the tide gauge station cannot be taken into account; third. , The island tide gauge station far away from the mainland lacks the sophisticated national 85 elevation system, and the leveling measurement results cannot be unified with the mainland

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  • Tide gauge station vertical reference detection method using GNSS buoys
  • Tide gauge station vertical reference detection method using GNSS buoys
  • Tide gauge station vertical reference detection method using GNSS buoys

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Embodiment 1

[0033] Such as Figure 1 to Figure 3 As shown, the vertical reference detection method of the tide gauge station utilizing the GNSS buoy described in the present invention comprises the following steps:

[0034] S1: GNSS precision level measurement: determine the height of the GNSS buoy antenna through precise measurement in the laboratory, and determine the height h1 from the phase center of the GNSS buoy antenna to the still water surface;

[0035] S2: On-site deployment of GNSS buoys: including the following small steps:

[0036] S21: GNSS buoys are deployed in the open sea near the marine station;

[0037] S22: The GNSS buoy is connected through a nearby fixed floating ball, so that its horizontal position does not change greatly;

[0038] S23: the sampling frequency of the GNSS buoy is set to 1 Hz;

[0039] S3: GNSS static reference station erection: GNSS static reference station is erected in the land area of ​​the marine station for differential post-processing of GN...

Embodiment 2

[0056] Take the sea experiment with unified measurement datum at a marine station along the coast of Shandong as an example.

[0057] Assume that a GNSS altimetry buoy is deployed in the open sea area outside the ocean station to observe data for more than 1 day, and the SSH of the GNSS buoy is obtained by the PPK method, and then the geoid difference is corrected, the data is filtered, and the filtered GNSS sea surface By making difference between the height data and the data of the tide gauge station, the difference between the elevation datum of the tide gauge station and the elevation datum of the WGS-84 reference ellipsoid is 54cm, and the slope obtained by the regression analysis is equal to 1.0, where figure 2 For the unified tide gauge and GNSS sea level height, image 3 is the regression analysis result of the unified GNSS and tide gauge sea surface height.

[0058] It should be noted that the unification of the datum of the ocean station tide gauge system is an imp...

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Abstract

The invention relates to a tide gauge station vertical reference detection method using GNSS buoys, and belongs to the technical field of tide gauge station vertical reference detection. The method comprises the following steps of S1, GNSS precision level measurement, S2, GNSS buoy on-site laying, S3, GNSS static reference station erection, S4, GNSS observation time setting, S5, GNSS buoy SSH calculation, S6, tide signal SSH data filtering, S7, SSH geoid difference elimination, and S8, unification of GNSS and tide inspection station vertical standards. The high-precision GNSS height measurement buoys are used for observing sea surface height information under the WGS-84 reference ellipsoid benchmark, the three problems are avoided, the high-precision GNSS height measurement buoys are conveniently and economically arranged in a sea area near an ocean station, accumulation of benchmark displacement errors and level measurement errors of a tide station is avoided, and tide station benchmark unification is carried out in any sea area (including an offshore island reef area).

Description

technical field [0001] The invention relates to a vertical reference detection method of a tide gauge station by using a GNSS buoy, and belongs to the technical field of vertical reference detection of a tide gauge station. Background technique [0002] At present, the detection of the survey datum of the tide gauge station mainly relies on the GNSS continuous leveling survey, that is, the elevation relationship is established between the GNSS base station and the datum point of the tide gauge station through GNSS precision leveling, so as to obtain the datum point elevation system of the tide gauge station and the WGS of GNSS The system height difference between the -84 reference ellipsoids makes all the tide gauge station datums in my country's coastal areas be reduced to the mathematical reference ellipsoids in the geometric sense, which in turn makes the absolute sea level change and the vertical datum of marine geodesy in a unified and strict To avoid the so-called gaps c...

Claims

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Application Information

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IPC IPC(8): G01S19/13
CPCG01S19/13
Inventor 杨磊
Owner THE FIRST INST OF OCEANOGRAPHY SOA
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