Synthetic Aperture Radar Drone Gets Interferometric Imaging

It’s been more than a year since [Henrik Forstén] built the first iteration of his synthetic-aperture radar (SAR) imaging drone, and he’s certainly been productive in the meantime. Not only did he develop a much more powerful autofocus algorithm to clean up the radar images, but he also extended the software to create high-resolution interferometric images . The main limitation of the original radar system was the GPS, which only had a resolution of about one meter; the autofocus algorithm owed