A hybrid scheme for compensating ionospheric scintillation effect on spaceborne P-band SAR

The spaceborne P-band synthetic aperture radar (SAR) is affected by ionospheric scintillation, which seriously impacts the imaging quality and measurements of biomass. Considering polarization modes and topographic features, a hybrid scheme for compensating ionospheric scintillation effect is proposed based on Phase Gradient Autofocus (PGA) and Faraday rotation (FR) estimation based method. Simulating with ALOS-PALSAR data, we quantitatively analyze the effectiveness of compensation and verify the scheme is capable of compensating scintillation effect considering different polarization modes and topographic features.