FIELD: physics.
SUBSTANCE: during flight of spacecraft in the visibility range of control and measurement stations (CMS), pseudorange to the CMS is measured on navigation radio signals of unmanned spacecraft based on the signal time delay. Doppler shift is determined and the measurements are transmitted to the computation centre of the main CMS. Based on the obtained values of predicted coordinates at fixed reference time instants with a defined interval, ephemerides are determined, which are then loaded onto the unmanned spacecraft using transmitting antennae of the CMS network, and then sent to users in form of a navigation message. Knowing matched ephemerides of the unmanned spacecraft at reference time instants, the user determines the coordinates of the unmanned spacecraft at an arbitrary moment in time by integrating equations of the model of the motion of the unmanned spacecraft.
EFFECT: high accuracy and reliability.
2 cl, 2 dwg
