TerraSAR-X Image Products: Characterization and Verification

The German SAR satellite TerraSAR-X has been launched in June 2007. The instruments flexibility and the capabilities of the operational TerraSAR-X Multi-Mode SAR Processor (TMSP) allow a huge variety of product types and variants for numerous applications. Already within weeks from the launch, the operational modes were checked out and the full variety of basic products was generated and delivered by the TMSP. This allowed to start the SAR product characterization early, providing major inputs to the overall SAR system characterization and calibration. Also the optimization of instrument commanding and SAR data processing is widely based on the SAR product characterization results. However, the image products are the outcome of an all-embracing workflow including ordering, commanding, instrument operation, reception, screening, processing, archival and delivery. Prerequisites for complete product verification are a stable and settled system and verified input products. Thus the SAR basic product verification could only be the final step of the very successful TerraSAR-X calibration and verification activities. The operationally available level 1b product portfolio and the product format are presented. Similarities and differences between the product variants are pointed out. Besides the basic products also experimental products, which may be available in a later project phase, are introduced. Product performance parameters for varying acquisition parameters are presented. Handling and interpretation of the TerraSAR-X SAR data products is addressed.