Determining spacecraft motion parameters methods and algorithms based on X-ray pulsar signals are considered. On-board navigation measurements of the X-ray pulsar PSR B0531+21 obtained by the «Integral» spacecraft have been processed. The problem of spacecraft orbit determination has been solved and the Doppler frequency shift of the pulsar signal has been determined. The obtained orbit are compared with the parameters of the orbit of the space observatory «Integral».

X-ray pulsars, orbit determination, navigation task, «Integral» space observatory

Mathematical modelling in actual problems of science and technics