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Shipborne gravity measurement method based on PPP technology

A measurement method and technology, applied in the direction of measuring devices, gravitational field measurement, geophysical measurement, etc., can solve the problems of increasing user operating costs and limited working distance, so as to improve operating efficiency, reduce operating costs, and ensure measurement accuracy Effect

Inactive Publication Date: 2014-06-11
THE CHINESE PEOPLES LIBERATION ARMY 92859 TROOPS
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Problems solved by technology

The application of the above method in shipborne gravity measurement has the following disadvantages: 1. At least two GPS receivers are required; 2. The working distance is limited (except for star station difference); 3. Increased operating costs for users

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  • Shipborne gravity measurement method based on PPP technology
  • Shipborne gravity measurement method based on PPP technology
  • Shipborne gravity measurement method based on PPP technology

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Embodiment Construction

[0018] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0019] A ship-borne gravity measurement method based on PPP technology is proposed to use PPP technology (precise single-point positioning technology) for ship-borne gravity measurement operations in view of the disadvantages of traditional ship-borne gravity measurement based on GPS differential positioning mode. The main equipment installed on the berth includes GPS antenna and receiver, gravimeter, electronic compass, etc. The operation requirements are as follows:

[0020] 1. The gravimeter and the dual-frequency GPS antenna are installed on a straight line. Measure the distance from the gravimeter to the GPS antenna before measurement; The plane relative distance (dx, dy) and vertical distance of the antenna;

[0021] 2. When the antenna is erected, the altitude angle is greater than 15 degrees without obstruction, and it is not easily in...

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Abstract

The invention relates to a shipborne gravity measurement method based on the PPP technology. The method is mainly characterized in that a gravity meter and a dual-frequency GPS antenna are installed on the same straight line and used for measuring shipborne gravity, GPS observation data acquired by a measurement wire are subjected to precise single-point positioning resolving, and the accurate 3D position of an observation point is obtained; according to the accurate 3D position of the observation point, Eotvos correction and perpendicular acceleration correction are calculated; according to the gravity observation value measured by the gravity meter, the Eotvos correction and the perpendicular acceleration correction, an image-borne result gravity value is obtained through comparison calculation of base points. According to the method, only one dual-frequency GPS receiver is needed, the 3D position of a shipborne gravity measurement line can be accurately calculated through the PPP technology, and the shipborne gravity measurement can be completed without arrangement of a reference station. With the method, not only is measurement accuracy guaranteed, but also operation cost is reduced, meanwhile, region and distance limitation does not exist in the operation process, and operation efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of marine measurement, in particular to a ship-borne gravity measurement method based on PPP technology. Background technique [0002] Shipboard gravity measurement is to determine the gravity value of the water surface point and its plane position. In addition to being directly related to the gravity sensor, the accuracy of ship-borne gravity measurement is also seriously affected by the accuracy of GPS positioning. The accuracy of GPS positioning determines the correction of Ertefus and vertical acceleration, and its magnitude of influence is sometimes much greater than the actual gravity value. GPS positioning methods for ship-borne gravity measurement can be divided into differential positioning and single point positioning. The application of differential positioning technology in ship-borne gravity measurement needs to select the differential positioning method according to the distance from the surve...

Claims

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Application Information

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IPC IPC(8): G01V7/16G01S19/14
Inventor 欧阳永忠李凯锋邓凯亮陆秀平任来平徐广袖刘传勇王耿峰
Owner THE CHINESE PEOPLES LIBERATION ARMY 92859 TROOPS
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