METHOD OF DETERMINATION OF STATE VECTOR OF PASSIVE SPACE OBJECT Russian patent published in 2015 - IPC B64G3/00 G01S17/58 

FIELD: aviation.

SUBSTANCE: invention relates to the space objects (SO) surveillance methods using optical and electronic facilities and can be used for identification of an orbit of passive SO (PSO) at the geostationary orbit independently from the board of active SO (ASO). During the drift along the quasi-stationary orbit (with smaller radius and period, compared with PSO) ASO performs the search and identification of PSO. After that the point of ascending or descending node of PSO orbit is determined. By periodic PSO appearances in this point the PSO nodical period of revolution is determined. With each orbit pass ASO comes nearer to PSO to the certain distance. During two orbit passes these distances form a dynamic base of stereotriangulation measurements of location of the named nodal point of PSO orbit. Using two additional points of the orbit located in front of and behind the nodal point outside the equatorial plane of Earth, PSO velocity vector is measured. After identification of location of the nodal point and PSO velocity vector, 6D vector of PSO orbital motion is calculated uniquely for the full orbit pass after the moment of the first registration of the named point.

EFFECT: minimising of ASO number, time of PSO observation and respective expenses related to characteristic velocity.

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