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Method for establishing time-varying sea tide load displacement model based on GNSS (Global Navigation Satellite System) technology

A sea tide and displacement technology, applied in character and pattern recognition, instruments, ICT adaptation, etc., to achieve high-precision effects

Active Publication Date: 2022-06-24
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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Problems solved by technology

However, at present, the ocean tide load displacement parameters are almost obtained by the classical harmonic analysis method to obtain the harmonic constants (amplitude and phase) of each tidal component, but in fact there are significant seasonal changes in the harmonic constants of each component tidal component of ocean tides

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  • Method for establishing time-varying sea tide load displacement model based on GNSS (Global Navigation Satellite System) technology
  • Method for establishing time-varying sea tide load displacement model based on GNSS (Global Navigation Satellite System) technology
  • Method for establishing time-varying sea tide load displacement model based on GNSS (Global Navigation Satellite System) technology

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[0048] The following detailed description is exemplary and intended to provide further explanation of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application.

[0049] figure 1 As shown, a method for establishing a time-varying ocean tide load displacement model based on GNSS technology includes the following steps:

[0050] S1. Calculate the hourly solution for the GNSS data, do not correct the tide load during the calculation process, and obtain the dynamic GNSS coordinate time series;

[0051] S2. Use the harmonic analysis algorithm of band-pass filtering to estimate the static ocean tide load displacement parameters...

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Abstract

The invention discloses a method for establishing a time-varying sea tide load displacement model based on a GNSS technology, and the method comprises the following steps: S1, carrying out the hour solution calculation of GNSS data, not carrying out the sea tide load correction in the calculation process, and obtaining a dynamic GNSS coordinate time sequence; s2, estimating a static sea tide load displacement parameter by using a harmonic analysis algorithm of band-pass filtering; s3, based on the static sea tide load displacement parameters, establishing a static sea tide load displacement model by using a least square configuration method; s4, calculating a seasonal change sequence of sea tide load displacement parameters by using a sliding harmonic analysis method; s5, researching time-varying characteristics and laws of the sea tide load displacement parameter time-varying sequence by using a singular spectrum analysis method, and modeling the time-varying laws; and S6, establishing a time-varying sea tide load displacement model. The method has the advantages that the sea tide model established by the method considers the sea tide load time-varying characteristic, the physical mechanism of the sea tide signal is better met, and the precision is higher.

Description

technical field [0001] The present application belongs to the application field of GNSS technology, and relates to a method for establishing a time-varying ocean tide load displacement model. Background technique [0002] With the development of observation technology, the accuracy of monitoring station displacement and gravity change of geodetic technology has reached 1mm and 0.1 respectively, which requires the same or higher accuracy to determine and separate the influence of tides. Among them, the model provided by the IERS2010 protocol can correct the solid tide with an accuracy of the order of 1mm; the model provided by the IERS2010 protocol can also correct the polar tide with a precision of the order of millimeters; at present, the calculation of the load effect of the ocean tide cannot meet the millimeter scale How to establish a high-precision offshore ocean tidal load-displacement model has always been the focus of research in related fields. [0003] Seasonal ch...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F17/18G06K9/62G06F119/12
CPCG06F30/20G06F17/18G06F2119/12G06F18/2135Y02A90/10
Inventor 周茂盛禹定峰高皜杨雷
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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