![]() This mechanism is also used in the calibration of the instrument. ![]() The system also employs a shutter mechanism preventing direct illumination of the instrument by the sun. The mirrors are rectangular and made of silicon carbide, a similar technology to those on the Gaia mission. It has a 150 mm (6 in) aperture and a three-mirror anastigmat design with a focal length of about 600 mm (24 in) the instantaneous field of view is about 21° by 3.5°. ĭesigned and built by Airbus Defense and Space in France, the MSI imager uses a push-broom concept and its design was driven by the large 290 km (180 mi) swath requirements together with the high geometrical and spectral performance required of the measurements. Within the 13 bands, the 10 meter spatial resolution allows for continued collaboration with the SPOT-5 and Landsat-8 missions, with the core focus being land classification. The Sentinel-2 satellites each carry a single multi-spectral instrument (MSI) with 13 spectral channels in the visible/near infrared (VNIR) and short wave infrared spectral range (SWIR). Sentinel-2C is scheduled to launch in 2024 on a Vega launch vehicle. Sentinel-2B was launched on 7 March 2017 at 01:49 UTC, also aboard a Vega rocket. The launch of the first satellite, Sentinel-2A, occurred 23 June 2015 at 01:52 UTC on a Vega launch vehicle. It is close to the Landsat local time and matches SPOT 's, allowing the combination of Sentinel-2 data with historical images to build long-term time series. This local time was selected as a compromise between minimizing cloud cover and ensuring suitable Sun illumination. The orbit is Sun synchronous at 786 km (488 mi) altitude, 14.3 revolutions per day, with a 10:30 a.m. The 290 km swath is created by the VNIR and SWIR, which are each made of 12 detectors that are lined in two offset rows. This allows for what would be a 10-day revisit cycle to be completed in 5 days. The satellites are phased 180 degrees from each other on the same orbit. To achieve frequent revisits and high mission availability, two identical Sentinel-2 satellites (Sentinel-2A and Sentinel-2B) operate together. Spatial resolution of 10 m, 20 m and 60 m.At high latitudes, Sentinel-2 swath overlap and some regions will be observed twice or more every 10 days, but with different viewing angles. Revisiting every 10 days under the same viewing angles.Systematic global coverage of land surfaces from 56° S to 84° N, coastal waters, and all of the Mediterranean Sea.Multi-spectral data with 13 bands in the visible, near infrared, and short wave infrared part of the spectrum.The Sentinel-2 mission has the following key characteristics: Sentinel-2 has been developed and is being operated by the European Space Agency, and the satellites were manufactured by a consortium led by Airbus Defence and Space in Friedrichshafen. The mission supports a broad range of services and applications such as agricultural monitoring, emergencies management, land cover classification or water quality. The mission is currently a constellation with two satellites, Sentinel-2A and Sentinel-2B a third satellite, Sentinel-2C, is currently undergoing testing in preparation for launch in 2024. Sentinel-2 is an Earth observation mission from the Copernicus Programme that systematically acquires optical imagery at high spatial resolution (10 m to 60 m) over land and coastal waters. Land and sea monitoring, natural disasters mapping, sea ice observations, ships detectionģ.4 × 1.8 × 2.35 m (11.2 × 5.9 × 7.7 ft)
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