Геофизические исследования

GEOPHYSICAL RESEARCH, 2021, vol. 22, no. 2, pp. 82-90. https://doi.org/10.21455/gr2021.2-5

UDC 528:629.78; 519.654

Abstract  References   Full text (in Russian)

MODEL OF ONE-DIMENSIONAL PROCESSING OF PRIMARY SATELLITE MEASUREMENTS USED TO DETERMINE ALTITUDE AND VERTICAL SPEED

A.A. Golovan⁽¹⁾, M.N. Drobyshev⁽²⁾

⁽¹⁾ Lomonosov Moscow State University, Moscow, Russia

⁽²⁾ Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia

Abstract. Airborne gravity measurements in hard-to-reach areas of the Earth presuppose highly accurate determination of the coordinates of flying laboratory or other carrier of gravimetric equipment. For these purposes, receivers of signals from satellite navigation systems are used. When solving problems that require accurate information about the change in vertical position of an object, it is proposed to use algorithmic solutions based on reduced models for processing primary satellite measurements. Primary satellite measurements are recorded in parallel with gravimetric observations during surveys, followed by office coprocessing and the quality of its results directly depends on the accuracy of determining the flight altitude on the route. An appropriate processing algorithm is presented, which makes it possible to obtain estimates of the values of altitude and vertical speed with increased accuracy (relative to standard algorithms) by using accurate information about the plane coordinates. Sessions of satellite measurements on a fixed base and a comparative analysis of the calculation results obtained by the proposed and traditional algorithms were carried out. The measurements were carried out with a frequency of 1 Hz and duration of 8 to 10 hours. The quality of the calculated results was determined by estimating the standard deviation of the altitude, which demonstrates a decrease in the amplitude of the spread of instantaneous values to 18 % when using a one-dimensional processing model with respect to a three-dimensional solution. The presented model of one-dimensional processing of primary satellite measurements for determining the altitude and vertical speed proved to be relevant and efficient algorithm. Its potential development in the future will improve the accuracy of solving scalar gravimetry problems during observations using mobile carriers, and, consequently, improve the accuracy of airborne gravimetric work.

Keywords: one-dimensional algorithm, navigation, satellite systems, primary processing of satellite measurements, GPS measurements, dual-frequency receiver, airborne gravimetry.

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