ESA also offers the Next ESA SAR Toolbox (NEST) produced under contract by Array Systems. NEST offers SAR image processing using the BEAM platform developed to support MERIS and other optical imagery. NEST is the cousin of PolSARPro offering a range of calibration, filtering and analysis functions. It also offers terrain correction but only of ENVISAT data (and in my experience only on sunny days when the moon is in the fourth quarter and pisces is in the ascendent). Actually, my latest installation of NEST doesn’t work so I am not able to properly report on the latest version.