A Fusion Method of Satellite Altimetry Gravity Data and Ship Gravity Data

A technology of gravity data and satellite altimetry, applied in the direction of measuring gravitational field, measuring device, geophysical measurement, etc., to achieve the effect of improving accuracy, simple and easy to understand the realization process, and rigorous and accurate formula derivation

Active Publication Date: 2018-05-15
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

Generally speaking, the statistical method is widely used, but it also has its shortcomings. The construction of the covariance function is the core issue of the application of the collocation method. Since the establishment of the empirical covariance function must be based on observation data with sufficient resolution, it is difficult to apply it in practice. It is not easy to obtain a covariance function model with a higher approximation degree in

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  • A Fusion Method of Satellite Altimetry Gravity Data and Ship Gravity Data
  • A Fusion Method of Satellite Altimetry Gravity Data and Ship Gravity Data
  • A Fusion Method of Satellite Altimetry Gravity Data and Ship Gravity Data

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[0050] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation of the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments:

[0051] refer to figure 1 , the specific implementation steps of the present invention are:

[0052] (1) Gravity data G measured by ship 0 As the center, determine the fitting radius S, S generally takes 3-5 times the spatial resolution of the satellite altimetry gravity data;

[0053] (2) Gravity data G measured by ship 0 As the center, within the range of fitting radius S, find n satellite altimetry gravity data points G i (1≤i≤n), and calculate the interpolation weight p of each satellite altimetry gravity data point i , the weight calculation formula is:

[0054]

[0055] In the above formula, p i (1≤i≤n) means the altimetry gravity data G of n satellites within the S range i (1≤i≤n) corresponding weight, r i (1≤...

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Abstract

The invention discloses a fusion method of satellite altimetry gravity data and ship survey gravity data. The basic steps are: determining the fitting radius with the ship survey gravity data point as the center; calculating the weight of the satellite altimetry gravity data points within the fitting radius range ; Calculate the interpolation result of the satellite altimetry gravity data point at the ship survey gravity data point; calculate the difference between the interpolation result and the ship survey gravity data; calculate the correction value of each satellite altimetry gravity data point according to the difference and weight; The fusion calculation obtains the gravity fusion data. The method provided by the invention has the advantages of being scientific and reasonable, easy to implement, and high in precision, and improves the accuracy of marine gravity data fusion products through fusion of satellite altimetry gravity data and ship survey gravity data.

Description

technical field [0001] The invention relates to the technical field of data fusion, in particular to the application field of fusion of multi-source ocean gravity data, in particular to a fusion method of satellite altimetry gravity data and ship survey gravity data. Background technique [0002] The ocean gravity field can reflect the internal structure of the earth in a wide range of sea areas. Constructing an accurate ocean gravity field and studying its changes will provide important geoscience data for human beings to solve the increasingly serious problems of resources, environment, and natural disasters. It can also be used for the study of geological structures. , resource survey and offshore oil and gas exploration and other work to provide an important basis. In addition, gravity anomalies have a great impact on the accuracy of inertial missiles, and their military significance is particularly important. [0003] Satellite altimetry and gravity have become an impo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V7/00G01V7/06G01V7/16
Inventor 刘善伟万剑华符艺瀚
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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