Gradient magnetic survey at altitudes of 20-40 km, and their use in the INTERMAGNET program

Vestnik Otdelenia nauk o Zemle RAN VOL. 3, NZ5001, doi:10.2205/2011NZ000103, 2011

Gradient magnetic survey at altitudes of 20-40 km, and their use in the INTERMAGNET program

Kuznetsov, V. D., Yu. P. Tsvetkov, S. V. Filippov

Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of RAS (IZMIRAN), Troitsk, Russia.

O. M. Brekhov

Moscow Aviation Institute (MAI), Moscow, Russia.

Abstract

The new method of search of places on a surface of the Earth in which there are no significant magnetic anomalies is developed. For this purpose on a stratospheric balloon magnetic fields and their vertical gradients on the basis of, length 6 km are measured. Magnetic anomalies and their gradients are extracted with the use of global analytical models of the normal magnetic field of the Earth. Vertical gradients of the anomaly magnetic field do not contain the contribution of far internal and external sources. Being based on this position, there are places on a surface of the Earth in which there are no significant magnetic anomalies. These places are recommended for accommodation of magnetic observatories under program INTERMAGNET.

Received 5 April 2011; published 20 May 2011.

Citation: Kuznetsov, V. D., Yu. P. Tsvetkov, S. V. Filippov, O. M. Brekhov (2011), Gradient magnetic survey at altitudes of 20-40 km, and their use in the INTERMAGNET program, Vestn. Otd. nauk Zemle, 3, NZ5001, doi:10.2205/2011NZ000103.