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| Titel |
The GMES Sentinel-2 Mission |
| VerfasserIn |
Bianca Hoersch, Francois Spoto, Philippe Martimort, Omar Sy, Claudia Isola, Pier Bargellini, Olivier Colin, Ferran Gascon, Umberto Del Bello, Aimé Meygret |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250048806
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| Zusammenfassung |
| In the frame of the Global Monitoring for Environment and Security programme (GMES)
jointly implemented by ESA and EC, ESA is developing the Sentinel-2 system, providing
globally with systematic acquisition high resolution (10-20 m) optical observations with a
high revisit tailored towards the needs of operational land services. The Sentinel-2 mission is
defined by frequent revisit time and high mission availability with two spacecraft operating
simultaneously. The orbit is sun-synchronous at 786 km with a 10:30 Local Time at
Descending Node.
The Sentinel-2 Multi-Spectral Instrument (MSI) features 13 spectral bands
spanning from the visible and near infrared (VNIR) to the short-wave infrared (SWIR),
featuring:
4 bands at 10m spatial resolution: the classical blue, green, red and near infra
red,
6 bands at 20m spatial resolution: 4 narrow bands in the vegetation red edge
spectral domain and 2 SWIR large bands
3 bands at 60m spatial resolution mainly dedicated for atmospheric corrections
and cloud screening
The mission is dedicated to the full and systematic coverage of land surface from -56Ë to
+84Ë latitude with the objective to provide cloud-free products typically every 15 to 30 days
with a 5 day revisit time. In order to achieve this objective a constellation of two
operational satellites is required. The two satellites will be spaced by 180Ë in the orbital
plane.
Data latency will be lower than 3 hours for Near Real Time (NRT) products and lower
than 6 hours for most of the other products.
Sentinel-2 will enable operations of valuable information services to the European Union
and its Member States in the frame GMES, in areas such as:
Risk Management (floods and forest fires, subsidence and land slides)
European Land Use/Land Cover State and Changes
Forest Monitoring
Food Security/Early Warning Systems
Water Management and Soil Protection
Urban Mapping
Natural Hazards
Terrestrial Mapping for Humanitarian Aid and Development.
This system will ensure data continuity of SPOT and Landsat multi-spectral sensor series
and further enhancement to account of future service evolution based on improved data
availability and quality for users.
The combination of the large swath, spectral range, coupled with the global and
continuous acquisition requirement with high-revisit frequency, will lead to the daily
generation of about 1.6 TByte of compressed raw image data from the constellation.
This corresponds to an average continuously sustained raw-data supply rate of 160
Mbps.
Following the successful completion of the MSI instrument and system Preliminary
Design Review in autumn 2008, the MSI and satellite are currently in phase C/D with
manufacturing, integration and test of the first equipments already delivered, such
as engineering models of MSI detectors and electronics and flight models of the
mirrors.
The launch of the first satellite is foreseen in 2013, and the launch of the second satellite
about 2 years later.
Keywords: Satellite; Earth Observation; Global Monitoring for Environment and
Security (GMES); Sentinel-2; European Space Agency; |
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