Method and device for obtaining accurate aviation magnetic measurement data based on standard deviation method

Abstract

The invention discloses a method and a device for obtaining accurate aviation magnetic measurement data based on a standard deviation method. The method comprises the steps of: according to the aviation magnetic measurement data T, calculating the x-direction horizontal gradient, the y-direction horizontal gradient and the z-direction vertical gradient of the aviation magnetic measurement data T to respectively calculate the standard deviation Sx of the x-direction horizontal gradient, the standard deviation Sy of the y-direction horizontal gradient, the standard deviation Sz of the z-direction vertical gradient and the sum S0 of the standard deviations in the x direction, the y direction and the z direction respectively; calculating a standard deviation Sz average value Wmean (Sz) of the vertical gradient in the z direction according to the standard deviation Sz of the vertical gradient in the z direction, and calculating a standard deviation S0 average value Wmean (S0) according to the sum S0 of the standard deviations in the x direction, the y direction and the z direction; and obtaining accurate aeromagnetic survey data according to the calculation. According to the method and device for obtaining the accurate aeromagnetic survey data based on the standard deviation method, the problem of singular point analysis existing in an NSTD method can be solved, the calculation stability is improved, the signal-to-noise ratio is increased, and the aeromagnetic data processing and conversion quality and the geologic body boundary recognition effect are improved.

Description

Technical field[0001]The present invention relates to the field of aviation magnetic test techniques, and more particularly to a method and apparatus for obtaining precise aviation magnetic measurement data based on standard deviation.Background technique[0002]Aviation magnetic measurement is to mount a aviation magnetometer (such as a light pump type, a nuclear rotation, and a magnetic positor type) system in the aircraft, through observed magnetic field parameters (eg, a total magnetic field total intensity T or total magnetic field abnormal Δt or its gradient To find magnetic or magnetic ore, to understand the geological structure, perform magnetic filling, solve urban and engineering stability and archeology.[0003]Aviation magnetic measurement data is a comprehensive reflection of magnetic geosetic magnetic field information on different depths, different forms and different sizes. However, due to the error or magnetic field of the measurement data, it is difficult to distinguis...

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Problems solved by technology

[0007] Based on this, the inventors of the present application found that the existing normalized standard deviation method has low resolution, poor precision and easy to produce false abnormal boundaries in practical applications, and when the denominator or close to 0, there is an "analytic singularity" in the normalized standard deviation method, which will make the calculation result unstable and affect the actual application effect

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