True-color image of Tarso Tousside and Trou au Natron in Chad. The dark area in the center of the image is Tarso Tousside, a broad volcanic massif located at the western end of the Tibesti Mountain Range. Old lava flows visibly emanate from the summit to the west. Southeast of Tarso Tousside is the Trou au Natron caldera. This image was acquired on November 9, 2022, by the Multi-Spectral Instrument (MSI) aboard the ESA (European Space Agency) Sentinel-2A and -2B satellites. View this image in Worldview.
The imagery available in NASA's Worldview are part of the Harmonized Landsat Sentinel-2 (HLS) project, which provides 30 meter resolution true-color surface reflectance imagery from the Operational Land Imager (OLI) and OLI-2 instruments aboard the joint NASA/USGS Landsat 8 and Landsat 9 satellites and the MSI aboard ESA's Sentinel-2A and -2B satellites. The data from the two instruments aboard the four satellites are processed through a set of algorithms to make the imagery consistent and comparable across the instruments. This includes atmospheric correction, cloud and cloud-shadow masking, spatial co-registration and common gridding, illumination and view angle normalization, and spectral bandpass adjustment.
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Reference: Tarso Tousside. Smithsonian Institution, National Museum of Natural History. Global Volcanism Program.