Description: The features of construction of lines of troposphere radio contact in relation to the lines of line-of-sight are related to the physical features of troposphere connection, which stipulate the features of choice of route of flow and preliminary calculation of reliability of connection line on its intervals for determination of reliability of connection on all of line. In obedience to an existent method the com-plete calculation of reliability of connection on the line of troposphere radio contact includes the followings stages: typeselection the troposphere stations for the construction of flow line; primary determination of number of intervals and preliminary placing of the tro-posphere stations; determination of co-ordinates of the stations for each of intervals of flow and distance line between them; determina-tion of corners of closing of horizon of aerials for each of the stations, total corner of closing on the type of locality of intervals and azi-muths of mutual position of aerials of the stations each of intervals; calculation of value of supply of level of radio signal on the intervals of flow line taking into account the expected value of total corner of closing; determination of fitness each of intervals of flow line by ver-ification of accordance of the expected value of supply of level of radio signal to the normative requirements; determination of reliability of connection for each of intervals and on all of flow line; determination of accordance of the got values reliability of connection to the normative requirements; conclusion about a fitness or not fitness of line of troposphere radio contact for the performance of the put ob-jective. In-process for the expected total corners of closing of horizon, length of intervals of line of troposphere radio contact, taking into account a radioclimatic district, within the limits of which development of line, and pores of year, is planned the mathematical algo-rithm of calculation of supply of level of radio signal is offered as by a basic constituent for determination of reliability of connection on each of intervals and on all of flow line. The sequences of calculation expressions and proper coefficients are got for this purpose. The values of coefficients were got by mathematical description of the graphs and nomogramm of mutual dependences of supply of level of radio signal from the proper parameters for the troposphere stations which are on the armament of troops of connection and informative systems of Aircrafts of Military Powers of Ukraine.
Keywords: line of troposphere radio contact, troposphere station, supply of level of signal, reliability of connection.