G - Physics – 01 – S
Patent
G - Physics
01
S
G01S 13/74 (2006.01) G01S 13/78 (2006.01)
Patent
CA 2057230
28572-390/19079 ABSTRACT OF THE DISCLOSURE A virtual secondary surveillance radar (VSSR) of the type described in U.S. Patent No. 4,115,771 can produce inaccurate or indeterminate range information for a trans- ponder positioned on or near a line between the actual SSR and the VSSR, owing to unfavorable geometrical relationships. This can be avoided by receiving the SSR interrogation and reply signals at two or more separated locations and proces- sing the signals to provide positional information at a display site. No radar transmissions other than those of the existing ATCRBS are required.
Hulland Burton L.
Litchford George B.
Gowling Lafleur Henderson Llp
Litchstreet Co.
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