PALSAR-3 DBF SAR signal simulation

ALOS-4 mission is the successor of the currently operational ALOS-2, developed by Japan Aerospace Exploration Agency (JAXA). It will employ digital beamforming capabilities, which will allow for high-resolution wide-swath imaging. The scan-on-receive operation and phase spoiling of the antenna pattern are core features to achieve desired SAR imaging performance. Aiming for mission preparation and calibration studies, a framework to simulate digital beamforming systems for ALOS-4 is presented. A model of the instrument is developed and point target response is used as metrics to validate performance predicted. Simulation algorithms for calibration and evaluation strategies will be discussed in this work.