GSC Sentinel-2 PDGS OCD - Emits - ESA

○ Data Access needs:
GSC Sentinel-2 PDGS OCD
Issue 1 Revision 2 (draft) - 25.07.2010
GMES-GSEG-EOPG-TN-09-0008
page 328 of 350
Main request form Land Services in terms of data access concern the access to a very
large data volume (covering either wide areas or long multi-temporal sequences or
both), nominally in a systematic manner with no ordering mechanism, but with no
stringent timeliness requirements.
Access to consistent and historical time series is essential for most of the land
applications. Regarding the necessity of obtaining cloud free images, this should be
achieved by the generation of cloud-free coverage. In more generic terms, the data
access terminal could support the optimal (and minimal) selection of Sentinel-2
products according to the strict coverage requirement defined (in terms of AOI,
frequency, and cloud free criteria).
This functionality should allow distribution of the data with low mapping frequency.
○ Products and quality needs
Although the level of maturity of DAP-R shows a general non homogeneity of
performances and products demand, the main requested product extrapolated is the
Level-1C, with an accuracy of 1/3 pixel dimension. Relevant is furthermore the
requirements expressed on the cloud coverage which normally has to be less than 5%.
In addition, the following drivers to the mission operations are highlighted:
○ Systematic pre-defined long term satellite tasking capability;
○ Capability to support generation of coverage data sets;
○ Access to systematic medium-term data through subscription;
○ Product quality stability monitoring, accurate radiometric calibration and traceability;
○ On-line access to historical products;
○ Mission data reprocessing capabilities;
A.3.2
Emergency Services
The GMES Emergency Response Support Service (ERSS) will support at global level all
stages of intervention cycle from early warning, to crises management and recovery in
response to natural, environmental, technological and man-made emergencies (e.g.
droughts, floods, storms, earthquakes, tsunami, volcano eruptions, landslides, fires, nuclear
plant accidents, etc). The primary scope of the ERSS is to provide rapid mapping services
(reference and damage assessment maps) to gather the useful information to know the
incoming anomalous events and the following critical effects, the actual damages and to
forecast and design the restore of normal life ordinary conditions. The purpose of the
Emergency Response Services is therefore to reinforce the European capacity to respond to
emergency situations.
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