DESIS Imaging Spectrometer data access and synergistic use with other ISS Earth observing instruments

Abstract

Since end of August, 2018, the imaging spectrometer “DLR Earth Sensing Imaging Spectrometer” (DESIS) is integrated into the “Multi-User System for Earth Sensing” (MUSES) installed on the International Space Station ISS, which also marks the start of the commissioning phase. After commissioning phase, the data will be available for scientific purposes under certain restrictions. This presentation informs about available data products, the requirements to access these products and the data access process. L1B (at sensor radiance), L1C (georeferenced after L1B) and L2A (reflectance after L1C) products are generated and delivered to the DESIS science users. Further, different acquisition modes are available: 1) Image Strip Mode is the standard measurement for earth observation and 2) BRDF Mode (Bi-directional Distribution Function) can be used to generate image data from the same area on ground seen at different observation angles (acquisitions up to 3 images at different observations angles e.g. 15° forward, nadir, 15° backward are possible). The talk further informs about the specific latitude dependent orbit requirements. The irregular acquisition possibilities allow acquiring data at different sun-target-sensor geometries and open up new possibilities for data evaluation. Finally, the potential of common data acquisitions of all ISS Earth observing instruments such as NASA’s Lidar instrument GEDI or the thermal ECOSTRESS mission and the emerging initiative to coordinate this, will be presented.