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Gravity anomaly data processing method applicable to strapdown marine gravimeter

An ocean gravimeter and gravity anomaly technology, which is applied to instruments, scientific instruments, measuring gravitational fields, etc., and can solve the problems of not knowing the processing process and method, and the failure to form the gravity anomaly of the strapdown gravimeter.

Active Publication Date: 2017-02-15
BEIJING INST OF AEROSPACE CONTROL DEVICES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the sensitivity of gravity data, the software of mature foreign products has been sealed as a program package, and the detailed processing process and method cannot be known when purchasing foreign instruments
At present, domestic methods for extracting gravity anomalies of strapdown gravimeters under complex sea conditions have not formed a good solution

Method used

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  • Gravity anomaly data processing method applicable to strapdown marine gravimeter
  • Gravity anomaly data processing method applicable to strapdown marine gravimeter
  • Gravity anomaly data processing method applicable to strapdown marine gravimeter

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Embodiment Construction

[0075] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0076] Such as figure 1 Shown is the working flow diagram of the gravity anomaly data processing method applicable to the strapdown marine gravimeter of the present invention. The gravity anomaly data processing method of the present invention specifically includes the following steps:

[0077] (1) Define the carrier coordinate system (system b) as the right front upper coordinate system, denoted as ox b the y b z b , the origin is at the center of mass of the gravimeter, x b 、y b and z b Pointing to the right, front and up of the gravimeter respectively. Install the strap-down gravimeter on the measuring ship, and the Y-axis of the gravimeter points to the bow of the ship, that is, forward. At this time, the XYZ axes of the gravimeter point to the right front and upper direction of the ship, as shown in image 3 Shown is a schematic diag...

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Abstract

The invention relates to a gravity anomaly data processing method applicable to a strapdown marine gravimeter. According to the method, a kalman filter adopted, an attitude error in inertial navigation calculation is estimated, correction is performed on an attitude matrix and a vertical specific force component so as to acquire more accurate specific force information, then correction items of the gravity are calculated according to location, speed and height information provided by a PPP technology, and finally gravity anomaly information along the route is acquired through low-pass filtering. The gravity anomaly data processing method can be applied to data processing of the marine gravimeter, is high in disturbance resisting capacity, has high data processing precision, can act as a data processing method for gravity anomaly extraction of a high-precision marine gravimeter, and is particularly applicable to gravity anomaly extraction of a high-precision strapdown moving-base marine gravimeter.

Description

technical field [0001] The invention relates to a gravity anomaly data processing method suitable for a strapdown marine gravimeter, and belongs to the technical field of testing high-precision inertial components in aerospace. Background technique [0002] At present, gravity measurement is widely used in civil and scientific research such as resource exploration and solid tide monitoring. The appearance of the gravimetric measurement system of the moving base makes it possible to measure the gravimetric force efficiently and in a wide range. Compared with the platform-type gravimeter, the strap-down gravimeter has the advantages of small size, low power consumption, simple structure, and high reliability. The data processing method of the gravity anomaly extraction of the strapdown gravimeter is the key technology for the strapdown gravimeter to be used in marine gravity measurement. [0003] The accuracy of the gravity measurement system is required to be better than 1m...

Claims

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Application Information

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IPC IPC(8): G01V7/06G01C25/00
CPCG01C25/005G01V7/06
Inventor 罗骋李东明王文晶侯淑华曾培香李海兵熊志明杨艳广
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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