초록 ▼

A method and system is disclosed for remote all-weather monitoring of civilian road traffic over large portions of a metropolitan region, using one or more microwave radar systems situated at elevated locations, such as high towers or pilotless aircraft. Pulse-Doppler waveforms provide, for each pos

A method and system is disclosed for remote all-weather monitoring of civilian road traffic over large portions of a metropolitan region, using one or more microwave radar systems situated at elevated locations, such as high towers or pilotless aircraft. Pulse-Doppler waveforms provide, for each position of the radar beam, range-velocity maps of traffic over a number of selectable roadway sections, which maps are used to estimate the speed, density, and volume of traffic flow and to identify discontinuities in the flow which may be indicative of accidents or obstructions. In addition, a high-resolution wideband waveform can be included to provide detailed examinations of selected portions of the monitored roadway sections.

대표청구항 ▼

A method for monitoring civilian vehicular land traffic at a plurality of selectable roadway sections, said method comprising: a. directing and transmitting beams of electromagnetic energy from at least one fixed elevated site towards selected roadway sections; for each said roadway section using a

A method for monitoring civilian vehicular land traffic at a plurality of selectable roadway sections, said method comprising: a. directing and transmitting beams of electromagnetic energy from at least one fixed elevated site towards selected roadway sections; for each said roadway section using a selected carrier frequency and a selected modulation; b. receiving at said at least one fixed elevated site signals of electromagnetic energy comprising vehicle echoes and other object echoes; and c. processing said signals to separate said vehicle echoes from said other object echoes and to produce measurements of range and Doppler velocity of vehicles in said selected roadway sections.