METHOD FOR READING VERTICAL GRADIENT OF ABNORMAL MAGNETIC FIELD OF EARTH AT STRATOSPHERIC HEIGHTS Russian patent published in 2007 - IPC G01V3/40 

FIELD: magnetometry, possible use for studying structure of earth core on basis of magnetic field.

SUBSTANCE: in accordance to the invention, values of induction of magnetic field of Earth are measured in three points in space by means of magnetic measuring devices, distributed along vertical line within limits of several kilometers. Simultaneously, navigational measurements of spatial coordinates of position of magnetic measuring devices are performed. Values of normal magnetic field of Earth are determined in points of magnetic measurements on basis of data of their precisely determined position. Additionally, effective length of measuring base is determined. Abnormal magnetic field of Earth is detected by subtracting values of normal magnetic field of Earth from measured values corresponding to them with following computation of vertical gradient of abnormal magnetic field of Earth. Resulting value of vertical gradient is positioned with location of middle magnetometer.

EFFECT: increased precision when isolating a vertical gradient of abnormal magnetic field of Earth and more precise alignment of location where vertical gradient is determined to location of source of abnormal magnetic field of Earth.