In this paper, the results of the approbation of a combined technology of the tropospheric delay calculation in relative positioning are presented. This technology is based on the application of a geodetic model in the lower two hundredmeter layer and a known tropospheric delay calculation model in the neutral atmosphere layers located above. Geodetic model parameters are determined using results of gradient meteorological measurements. The analysis of accuracy and of efficiency of the practical application of the geodetic model of the ground atmosphere layer is made. The prospects of the combined technology use for the increasing the relative positioning accuracy are shown.