PLOT BOARD FOR GROUND SURVEILLANCE OBJECT SELECTION FROM ORBITAL SPACE VEHICLE Russian patent published in 2008 - IPC G01C21/24 B64G1/22 

FIELD: physics, space technology.

SUBSTANCE: plot board for ground surveillance object selection from orbital space vehicle refers to space technology. The plot board for ground surveillance object selection from orbital space vehicle includes flexible tape with the ground map printed on it, and semitransparent plate above the tape. Two halves of the space vehicle's orbit pass are drawn on the plate in such a way that the ascending node in the beginning of the first half of the orbit pass and the descending node in the beginning of the second half of the orbit pass are superimposed. The plot board also comprises a device for the tape map transport along the plate with orbit pass image; the transport device comprising two shafts that are spaced-apart and interconnected in parallel. The map printed on the tape has the equator beginning and ending points superimposed, and the tape is made in the form of a ring and pulled on the shafts so as to move along the map equator line. The distance between the shaft axes and size of the plate with the orbit pass image along the equator direction are equal to (L-d)/2, where L - is the map equator length; d - is absolute distance between passes measures in linear units along the map equator; shaft radius equals to d/(2π). The stated above gives the effect of decreased plot board size.

EFFECT: decreased size of plot board for ground surveillance object selection from orbital space vehicle.

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