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This mechanism is also used as a calibration device by collecting the sunlight after reflection by a diffuser. A shutter mechanism preventing the instrument from direct illumination by the sun.A full-field and full-pupil on-board diffuser for radiometric calibration to guarantee high-quality radiometric performance.The 12 detectors on each focal plane are in a staggered configuration to cover the entire field of view. Two distinct arrays of 12 detectors mounted on each focal plane covering VNIR and SWIR channels respectively.Spectral separation in the various bands is provided by stripe filters mounted on top of the detectors. mercury-cadmium-telluride (MCT) detectors hybridised on a CMOS read-out circuit for SWIR (the SWIR focal plane is passively thermo-controlled at temperatures below 195 K).monolithic Complementary Metal Oxide Semiconductor (CMOS) detectors for VNIR.The telescope structure and the mirrors are made of silicon carbide, which provides a very high optical stability to mass ratio and minimises thermal deformation. Its 290 km swath width is a larger swath than previous multi-spectral optical missions such as SPOT and LANDSAT.
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The optical design has been optimised to achieve state-of-the-art imaging quality across its very wide field of view. A Three-Mirror Anastigmat (TMA) telescope with a pupil diameter equivalent to 150 mm, isostatically mounted on the platform to minimise thermo-elastic distortions.It provides long-term protection and controls flea infestations and flea allergy dermatitis in dogs. The oral treatment controls adult hookworms, and removes and prevents roundworms, tapeworms, and whipworms. It prevents heartworm infection by killing immature form of heartworm. The MSI is designed and built by Airbus Defence and Space, France, and is based on a push-broom concept (Figure 1). Sentinel Spectrum is a multi-spectrum dewormer treatment for dogs. Note: To see more detail, open the image to see a larger version.įigure 1: SRF and transmission due to vertical column WV absorption MSI Description Table 1: Spectral bands for the SENTINEL-2 sensors (S2A & S2B)įigure 1 (below) shows the S2A spectral response functions (SRF) and transmission due to vertical column Water Vapour (WV) absorption for subarctic winter atmosphere (light blue, lowest WV content) and tropical atmosphere (darker blue, highest WV content).