FIELD: navigation system.
SUBSTANCE: invention relates to navigational instrument making and can find application in navigation systems of spacecraft (SC) according to the signals of navigation satellites (NS) included in Global Satellite Navigation Systems (GSNS), for example, by signals of the GLONASS or the GPS NS. To this end in the method for determining SC coordinates by signals of navigation satellites, which includes the emission of radio signals from navigation satellites with known orbital parameters at known times, reception of radio signals from the navigation satellites by antennas mounted on the spacecraft from i navigation satellites being within the fields of view of the respective antennas, determination of range di between i navigation satellites and the SC by the difference in the radio signal reception and emission time, the determination of the SC coordinates from the measured distances and coordinates 
of the navigation satellites at the time of measurements as coordinates of a point lying simultaneously on n spheres with centers in points in contrast to the known one, vectors from the center of mass of the SC to the antennas in the coordinate system associated with the SC are determined, further determined is the orientation of the SC in the Greenwich coordinate system, determined are the vectors from the center of mass of the SC to the antennas in the Greenwich coordinate system, determined are projections of these vectors on the direction from the SC to the navigation satellites, summed are these projections with the measured distances of the respective antennas, and determined are the coordinates of the SC from the obtained sums. Herewith in the device for determining the coordinates of the SC according to the signals of the navigation satellites, including m antennas, the outputs of which are connected to the corresponding inputs of the m units of forming the distance and the coordinates of the navigation satellites, as well as the unit for determining the coordinates of the SC, an orientation unit and an antenna coordinate setter are additionally introduced, the outputs of which are connected to the corresponding inputs of the antennas coordinate converter, the outputs of which are connected to the first inputs of the distance correction driver, to the second inputs of which the first output of the unit of forming the distance and the coordinates of the navigation satellites is connected, the outputs of the distance correction driver are connected to the inputs of m adders, to the second inputs of which the second outputs of the unit of forming the distance and the coordinates of the navigation satellites are connected, the outputs of the adders are connected to the first inputs of the SC coordinate determination unit, to the second inputs of which the first outputs of the unit of forming the distance and the coordinates of the navigation satellites are connected, the output of the SC coordinate determination unit is the output of the claimed device. Thus, an increase in the accuracy is ensured by increasing the number of measurements from the navigation satellites due to using the signals of all the NS falling within the field of view of all the antennas to determine the SC coordinates, as well as due to bringing measurements from the coordinates of several antennas to one common coordinate that coincides with the center of mass of the SC.
EFFECT: technical result is an increase in the accuracy of the determination of the SC coordinates at arbitrary angular manoeuvring of the SC.
2 cl, 7 dwg
