METHOD FOR SIMULTANEOUS DETERMINATION OF SIX MOTION PARAMETERS OF SPACECRAFT WHEN MAKING TRAJECTORY MEASUREMENTS AND SYSTEM FOR REALISING SAID METHOD Russian patent published in 2014 - IPC B64G3/00 G01S13/58 

FIELD: radio engineering, communication.

SUBSTANCE: group of inventions relates to methods and means of making spacecraft trajectory measurements using radio links. The method employs three spaced-apart measurement stations. The first measurement station operates in coherent query mode and measures relative range and velocity of the spacecraft and records the time of arrival of the response transmission of the range query from the spacecraft. The other two measurement stations operate in non-coherent non-query mode. Said stations receive a response (frequency-shifted) signal from the spacecraft generated from the query signal of the first measurement station. Based on the received signal, said two measurement stations determine the range and velocity of the spacecraft relative to said measurement stations, as well as the time of arrival of the response transmission of the query from the spacecraft. Information received from said three measurement stations is transmitted to a ballistic centre for processing.

EFFECT: more accurate determination of the trajectory of a spacecraft.

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