ИСТИНА

Modern measuring equipment has a high sampling rate and can be installed at vessels and aircraft, thus huge arrays of onboard measurements can be obtained. These measurements require a special approach when performing mathematical processing and geophysical interpretation. Extensive sub-latitudinal profile GNSS measurements were carried out during an expedition along the Northern Sea Route in 2020. More than 22 000 km were covered and a large number of coordinates were obtained along the route of the vessel in three months. The S-approximation was performed for the measured values. The approximated values have a high convergence with the measured data. Itshows the effectiveness of using the S-approximation method for large amounts of data obtained on extra-long profiles.