NIST logo

Publication Citation: 'Across-the-Road Photo Traffic Radars: New Calibration Techniques'

NIST Authors in Bold

Author(s): Claude Weil; Dennis G. Camell; David R. Novotny; Robert T. Johnk;
Title: 'Across-the-Road Photo Traffic Radars: New Calibration Techniques'
Published: May 17, 2004
Abstract: We discuss simulator units for calibrating across-the-road Doppler traffic radar transceivers used in enforcement of highway speed limits. Two units of very similar design were developed, one operating at K-band (24 GHz) and the other at Ka-band (35 GHz). The signal received from the radar transmitter is frequency-modulated at rates that correspond to the expected Doppler shift for approaching and receding vehicles travelling at speeds of 25 to 200 km/h. The modulated signal is subsequently retransmitted back to the radar receiver, which demodulates it and then displays the simulated speed . The required calibration accuracy is 1.6 km/h at 90 km/h.
Proceedings: MICROWAVE & RADAR WEEK IN POLAND
Location: Warsaw, PL
Dates: May 17-19, 2004
Keywords: Calibration;Doppler;radar;speed measurement;traffic
Research Areas: Electromagnetics