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Sentinel-2A
Sentinel-2A Satellite Sensor (10m)
Sentinel-2A satellite sensor was successfully launched on June 23, 2015 at 03.51:58 am CEST from a Vega launcher fom the spaceport in Kourou, French Guiana. Sentinel-2A satellite is the first optical Earth observation satellite in the European Copernicus programme and was developed and built under the industrial leadership of Airbus Defence and Space for the European Space Agency (ESA).
Sentinel-2A satellite was built by Airbus Defence and Space will add color to the Copernicus programme through multispectral instrument that provides unique image quality. Copernicus is the new name of the European Commission's Earth Observation Programme, previously known as GMES (Global Monitoring for Environment and Security).
The mission is dedicated to the full and systematic coverage of land surface including major islands globally with the objective to provide cloud free products typically every 15 to 30 days over Europe and Africa.
Sentinel-2A satellite image data will support:
- Generic land cover, land use and change detection maps
- Maps of geophysical variables for leaf area index, leaf chlorophyll content, leaf water content
The span of 13 spectral bands, from the visible and the near-infrared to the shortwave infrared at different spatial resolutions ranging from 10 to 60 meters on the ground, takes global land monitoring to an unprecedented level.
The four bands at 10 meter resolution ensure continuity with missions such as SPOT-5 or Landsat-8 and address user requirements, in particular, for basic land-cover classification. The six bands at 20 meter resolution satisfy requirements for enhanced land-cover classification and for the retrieval of geophysical parameters. Bands at 60 meter are dedicated mainly to atmospheric corrections and cirrus-cloud screening.
Sentinel-2A satellite is the first civil optical Earth observation mission of its kind to include three bands in the ‘red edge', which provide key information on the vegetation state.
Sentinel-2A satellite will be able to see very early changes in plant health due to its high temporal, spatial resolution and 3 red edge bands. This is particularly useful for the end users and policy makers for agriculture applications and to detect early signs of food shortages in developing countries.
Sentinel-2A Satellite Sensor Specifications
|
Sentinel-2A launch |
June 2015, by Vega from Kourou, French Guiana |
|
Sentinel-2B launch |
July 2016, by Rockot from Plesetsk, Russia |
|
Orbit |
Sun-synchronous at altitude 786 km, Mean Local Solar Time at descending node: 10:30 (optimum Sun illumination for image acquisition) |
|
Geometric revisit time |
Five days from two-satellite constellation (at equator) |
|
Design life |
Seven years (carries consumable for 12 years: 123 kg of fuel including end of life deorbiting) |
|
MSI (Multispectral Imager) |
MSI covering 13 spectral bands (443–2190 nm), with a swath width of 290 km and a spatial resolution of 10 m (four visible and near-infrared bands), 20 m (six red edge and shortwave infrared bands) and 60 m (three atmospheric correction bands). |
|
Receiving stations |
MSI data: transmitted via X-band to core Sentinel ground stations and via laser link through EDRS. |
|
Main applications |
Agriculture, forests, land-use change, land-cover change. Mapping biophysical variables such as leaf chlorophyll content, leaf water content, leaf area index; monitoring coastal and inland waters; risk and disaster mapping |
|
Mission |
Managed, developed, operated and exploited by various ESA establishments |
|
Funding |
ESA Member States and the European Union |
|
Prime contractors |
Airbus Defence & Space Germany for the satellite, Airbus Defence & Space France for the instrument |
|
Cooperation |
CNES: Image quality optimization during in-orbit commissioning |
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