Abstract: A method of eliminating spurious echoes in SAR imaging comprises a step Etp1 of defining the SAR imaging parameters, a step Etp2 of calculating the spectrum of the signal received, in each distance bin, of a zone of interest 51, a step Etp3 of filtering the spectra in each distance bin, a step Etp4 of SAR imagette 51 formation and a step Etp5 of concatenating the SAR imagettes 51 to form the final SAR image.

Abstract: A method of eliminating spurious echoes in SAR imaging comprises a step Etp1 of defining the SAR imaging parameters, a step Etp2 of calculating the spectrum of the signal received, in each distance bin, of a zone of interest 51, a step Etp3 of filtering the spectra in each distance bin, a step Etp4 of SAR imagette 51 formation and a step EtpS of concatenating the SAR imagettes 51 to form the final SAR image.

Abstract: A system and method for scanning through a 360° azimuth by a surveillance radar antenna. The method includes driving at slow speed the radar antenna including two electronic scanning antennas installed back to back, simultaneously controlling the electronic aiming of each of the two electronic scanning antenna, switching the microwave signal sent alternatively between the two electronic scanning antennas and, before each rotation of the radar beam, initializing the electronic aiming of each of the two elementary electronic scanning antenna at a determined angle &thgr;i. The radar system includes the radar antenna with the two elementary electronic scanning antennas and an aiming computer.

Abstract: A method for the detection of a target by a radar in the presence of noise, the detection being performed on M antenna rotations, comprises at least: a first step for the estimation of the Doppler frequency ({circumflex over (f)}) of the target; a detection step, the target being detected if an associated variable Z is greater than or equal to a predetermined threshold S, the variable Z being defined according to the following relationship: Z = MAX t ∈ D t , f ∈ D f ⁢ ( ∑

Abstract: The disclosure pertains to methods of fast exploration in azimuth by a surveillance radar antenna and to radars implementing such methods. The method consists in driving, at slow speed, an antenna comprising two elementary electronic scanning antennas installed back to back, simultaneously controlling the electronic aiming of each elementary electronic scanning antenna, switching over the microwave signal sent alternatively between the two elementary electronic scanning antennas and, before each rotation of the radar beam, initializing the electronic aiming of each elementary electronic scanning antenna at a determined angle &thgr;i. The radar comprises an antenna with two elementary electronic scanning antennas and an aiming computer. Application especially to a sea patrol radar.