Abstract
The article is devoted to the development of an algorithm for correcting of vector magnetic data measured by a magnetometer manually or using unmanned aerial vehicles. This algorithm and its software realization is necessary in the problem of navigating by magnetic data. The idea of magnetic positioning is to create a map of the magnetic field in the selected region from the measurement data, and for this all measurements must be corrected taking into account the model data. Measurement errors occur due to various kinds of interference associated with the incorrect orientation of the magnetometer axes. The model magnetic field of the Earth, calculated from known models IGRF or WMM, is taken as a reference. The algorithm is based on the search for orientation angles in the transfer matrix, which ensures minimization of difference between measured and model fields.