| 摘要 |
<p>Apparatus for establishing a reference coordinate grid in the system memory aboard a vehicle to be operated in conjunction with an array of transponders (1, 2, 3, 4) in a transponder positioning system. A 'smart' transponder (1) provides coded signals to access all transponders. An interrogation code is used in a direct mode to measure distances (R1, R3) between the smart transponder (1) and individual adjacent transponders (2, 4) while a relay code is used in a relay mode to measure distances (R2, R4, R5, R6) between pairs of remote transponders.</p> |
