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All-weather-tactical-strike-system-AWTSS-and-method-of-operation

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Details

Inventors: Mangiapane, Rosario; Crain, Arthur;
Assignee: Raytheon Company (Lexington, MA)
Primary Examiner: Tubbesing; T. H.
Assistant Examiner:
Attorney, Agent or Firm: Mofford; Donald F., Sharkansky; Richard M.

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 radome-induced 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.

DETAILED DESCRIPTION With the foregoing background of this invention in mind, it is a primary object of this invention to provide an AWTSS which is capable of performing, in a hostile environment, all of the requisite actions of such a system.
A further object of this invention is to provide an AWTSS which uses a single radar to carry out the desired functions.
The foregoing and other objects of this invention are generally attained by providing, in a tactical aircraft carrying air-to-ground missiles, an improved pulse Doppler radar and signal processor, which radar and processor operate in conjunction with inertial measuring devices also carried on the aircraft to operate as desired in any of the modes of operation required for an AWTSS.
Specifically, the contemplated radar and signal processor are arranged to be substantially immune to electronic countermeasures and to be operative even when the aircraft equipped with the contemplated AWTSS is violently maneuvered.

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