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Development of new calculation method for zenith troposphere delay of GPS signals

Beginning from 1980s, the steady increase of total amount of deposited water or general amount of water vapor in the atmosphere almost above all regions of the Earth is observed. The changing of this parameter over the oceans strongly correlates with the temperature of sea water surface both in time and space. Obviously, the increase of total amount of deposited water or sum amount of water vapor leads to the growth of corresponding components of troposphere delay of GPS signals called “wet delay”. To achieve the goal set, foremost, the correlation properties of “wet delay” of GPS signals associated with the regularities of changing of total amount of deposited water in the atmosphere have been studied. Carried out analysis of actual materials of correlation properties of “wet” troposphere delay justified the presence of the aspects negatively affecting the correlation ratio of total amount of deposited water. Special correlation indexes allowing to regulate the balance of separate components of correlation function of “wet delay” are offered and their extreme nature shown as well. A new calculation technique for zenith wet delay by set value of integrated parameters of water vapor in the atmosphere has been developed.