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The paper discusses the problems of construction of highly effective from the technical and economic point of view regional system for monitoring and managing of the local differential subsystem of the global navigation satellite system GLONASS / GPS, which provides the control of integrity both of the satellite navigation system and its differential subsystem, as well as consumer notification of all contingencies. The optimal structure of the control and management system of the differential subsystem on inland waterways of Russia is proposed. This system uses mid-wave frequency control and correction stations and includes regional control and management center, a network of remote control and management stations and a network of remote control points providing the control of integrity of the differential subsystem with the required discreteness in time. It is established that the necessity for a branched network of remote control points is caused by the strong influence of the underlying surface on the propagation of radio waves of the medium-wave range, as well as by the presence of considerable industrial disturbances and mutual disturbances from adjacent control and correction stations. The options of construction of an information network for data exchange between the elements of the considering system are suggested. A new method of quality control of a signal of the differential correction was developed. This method is based on the mathematical processing of signal parameters and leads to a significant simplification of the equipment of remote control points and, as a result, to a significant increase of the economic efficiency of the system implementation. The correspondence of the error probability of the piece-by-piece receiving of digital signal of the differential correction message to the permissible error probability was chosen as one of the criteria for the quality assessing. An expression for the error probability for incoherent receiving under the influence of fluctuation noise and also concentrated disturbances is presented in the article. The algorithm for calculation of the error probability was obtained. It includes the determination of the signal energy and the concentrated disturbance at the receiving point and the coefficient of mutual difference of the signal and noise. The structural scheme and composition of the equipment realizing the given algorithm are given.

vestnik gosudarstvennogo universiteta morskogo i rečnogo flota imeni admirala s. o. makarova/vestnik gosudarstvennogo universiteta morskogo i rečnogo flota imeni admirala s.o. makarova

CONSTRUCTION OF CONTROL SYSTEM OF DIFFERENTIAL SUBSYSTEM OF GLONASS/GPS WITH USE OF THE METHOD OF MATHEMATICAL PROCESSING OF SIGNAL PARAMETERS OF DIFFERENTIAL CORRECTION