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AssigneeRaytheon Company
InventorsGerald A. Bonta, George W. Ogar, Theodore J. Peregrim, Rosario Mangiapane
Estimating the term…
An AWTSS is shown to be made up of an improved synthetic aperture radar (SAR) for generating radar maps with various degrees of resolution required for navigation of an aircraft and detection of ground targets in the presence of electronic countermeasures and clutter. The SAR consists, in effect, of four frequency-agile radars sharing quadrants of a single array antenna mounted within a radome on a "four axis" gimbal with a sidelobe cancelling subarray mounted at the phase center of each quadrant. Motion sensors are also mounted on the single array antenna to provide signals for compensating for vibration and stored compensating signals are used to compensate for radomeinduced errors. In addition, a signal processor is shown which is selectively operable to generate radar maps of any one of a number of desired degrees of resolution, such processor being adapted to operate in the presence of clutter or jamming signals.
The method of operating an airborne synthetic aperture monopulse radar having an antenna with four quadrants arranged in the form of a diamond such that the phase centers of two of such quadrants lie in the slant plane determined by the aircraft velocity vector and the line-of-sight vector to a ground reference point and the phase centers of the remaining two quadrants lie in a plane orthogonal to the slant plane, to allow, in the presence of competing ground clutter, the angular separation of moving targets spaced from boresight to be determined, such method comprising the steps of:
Dependencies are inferred from the claim text.