초록 ▼

A single two dimension radar system having the capability of developing two dimensional data on all targets in its surveillance volume and three dimensional data for selected targets in its surveillance volume is disclosed. A single phased array antenna having two selectable elevation beam patterns,

A single two dimension radar system having the capability of developing two dimensional data on all targets in its surveillance volume and three dimensional data for selected targets in its surveillance volume is disclosed. A single phased array antenna having two selectable elevation beam patterns, a wide beam and a narrow beam, is rotated in azimuth. In the two dimension mode, targets are detected and tracked in an azimuth and range position through use of the wide elevation beam. Upon selecting a particular target in track for three dimension data extraction, the radar system changes to the three dimension mode prior to the azimuth position of the selected target, and performs a sequential lobing process of the narrow beam in elevation angle. The power ratios of the target returns in the sequential lobes are analyzed and an elevation position of the selected target is determined. The radar system reverts to the two dimension mode after leaving the azimuth position of the selected target.

대표청구항 ▼

A radar system for a selectable three dimension or two dimension position indication of targets within the surveillance volume comprising: an antenna adapted for selectively directing a fan beam and a narrow beam, wherein the narrow beam is scannable in elevation angle and has a narrower beamwidth i

A radar system for a selectable three dimension or two dimension position indication of targets within the surveillance volume comprising: an antenna adapted for selectively directing a fan beam and a narrow beam, wherein the narrow beam is scannable in elevation angle and has a narrower beamwidth in elevation angle than the fan beam; a two dimension radar system coupled to the antenna for transmitting signals into the surveillance volume and for receiving reflected target signals from the antenna and for processing the reflected signals by means including at least one receiver for indicating the azimuth and range of the targets; and an elevation angle measurement means coupled to the antenna and to the two dimension radar system for determining the elevation position of a selected target by selecting and sequentially lobing the narrow beam through a plurality of positions, and by receiving from the at least one receiver of the two dimension radar system reflected signals received from the selected target by the two dimension radar system during the scanning of the narrow beam and by processing those signals to indicate the elevation position of the selected target.