The invention provides an
azimuth parameter obtaining method for a
satellite-borne
synthetic aperture radar in a sliding bunching mode. An
azimuth initial imaging belt length, an antenna
beamwidth, an initial squint angle, a terminate squint angle and a target slant distance are utilized to establish a reference slant
distance model corresponding to a beam rotation center; reference slant distance data are obtained, and an effective
irradiation time model corresponding to a
point target is established according to the reference slant distance data; effective initial
irradiation time and effective terminate
irradiation time of the
point target are obtained, and an effective
Doppler frequency and
Doppler bandwidth model corresponding to the
point target is established according to the effective initial
irradiation time and effective terminate
irradiation time of the point target; initial effective
Doppler frequency, terminate effective
Doppler frequency, the
Doppler bandwidth and the resolution declining coefficient corresponding to the point target are obtained, an
azimuth resolution model corresponding to the point target is established according to the initial effective Doppler frequency, terminate effective Doppler frequency, the
Doppler bandwidth and the resolution declining coefficient corresponding to the point target, and the azimuth resolution corresponding to the point target is obtained; when the azimuth resolution is larger than a resolution index requirement, the maximum azimuth imaging belt length datum is output.