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Application grantedgrantedCritical
Publication of FR955390ApublicationCriticalpatent/FR955390A/fr
G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
G01S13/87—Combinations of radar systems, e.g. primary radar and secondary radar
G—PHYSICS
G08—SIGNALLING
G08G—TRAFFIC CONTROL SYSTEMS
G08G1/00—Traffic control systems for road vehicles
G08G1/01—Detecting movement of traffic to be counted or controlled