Abstract
The Remote Sensing Laboratory at INTA has been operating a CASI-1500 instrument since 2009. A specific processing chain has been implemented within the INTA airborne data Processing and Archiving Facility. In this chain, raw data (level 0 product) are transformed to at-sensor radiance (level 1b) and later to geolocated at-sensor radiance (level 1c). Other processing levels, as atmospherically corrected reflectance (L2b / L2c), can also be produced. The resulting image products are delivered together with radiometric statistics, metadata and quality descriptors, the latter according to EUFAR HyQuaPro recommendations. In this paper, details about this processing chain are given, including some points related to in-flight spectral calibration and noise and SNR estimation in operational images. The paper also describes the procedure for in-flight geometric calibration (internal orientation calibration and boresight estimation). Finally, an evaluation of the product accuracy (radiometric, spectral and geometric) is presented, using imagery from CASI campaigns performed by INTA.