The NASA/Indian Space Research Organization (ISRO) SAR (NISAR) project team has created sample products using JAXA ALOS-1 PALSAR data as a surrogate for NISAR. The sample covers the full suite of planned products, from Level 0 raw data (in NISAR format) to Level 1 and Level 2. These data cover a smaller area than a NISAR frame.
However, the format and metadata content are fully compatible with the data NISAR will produce after entering the science phase, allowing users to prepare their analysis tools well in advance of operations. In addition, a suite of products based on full-frame simulated radar data will be made available.