Scale value correction method applied to shipborne gravimeter

Abstract

The invention discloses a scale value correction method applied to a shipborne gravimeter. The method comprises the following steps of establishing an error compensation correction model for observinga gravity value by taking the closed gravity data information of the shipborne gravimeter which goes to and from a port of embarkation and stops at a halfway port of recruit as a basic mathematical model, and carrying out error compensation on the observed gravity value; solving a scale value based on the corresponding relationship between the compensated gravity observation value and an absolutegravity value, and compensating the data of the shipborne gravimeter. The method can eliminate the system error caused by the scale value error, can obtain the high-precision voyage number survey result data, and has the important guiding value and practical significance for the marine geophysical survey, especially the marine gravity measurement of deep and far sea voyage numbers.

Description

technical field [0001] The invention belongs to the application field of system difference calibration and data processing of observation data of a ship-borne gravimeter, and specifically relates to a grid value correction method applied to a ship-borne gravimeter. Background technique [0002] As an important part of earth gravimetry research, marine gravimetry provides gravity data for studying the shape of the earth and the internal structure of the earth, guaranteeing spaceflight and long-range weapon launch, and exploring marine mineral resources. As the key core equipment of marine geophysical survey, the ship-borne gravimeter, in addition to various systematic and accidental errors caused by factors such as the external environment and the level of on-site operators, often in the process of equipment use, the ship-borne gravimeter itself Grid value precision also changes. [0003] Affected by factors such as shipbuilding technology and ship endurance, marine gravity ...

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Problems solved by technology

[0004] At present, domestic marine gravity surveys still use foreign marine gravimeters on a large scale. The traditional method is to transport the gravimeter back to the production site for calibration or select two long baseline points on land for calibration. However, the ship-mounted gravimeter is a fine Instruments and equipment are extremely easy to be affected by factors such as collisions during transportation, resulting in secondary changes in grid values

With the continuous development of science and technology, deep-sea gravity surveys are becoming more and more common, and one or more docks are often docked in the middle. Based on this situation, traditional methods cannot effectively solve practical problems. Therefore, this plan proposes a multi-port based Calibration method of ship-borne gravimeter grid value based on docked gravity data model

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