GSC Sentinel-2 PDGS OCD - Emits - ESA

GSC Sentinel-2 PDGS OCD
Issue 1 Revision 2 (draft) - 25.07.2010
GMES-GSEG-EOPG-TN-09-0008
page 330 of 350
o EGSE_027 -Basic Mapping
o EGSE_031 UNOSAT – User Ambassador for UN users: Basic Mapping Small
Scale
o EGSE_032 - Crisis and Damage Mapping
o EGSE_033 -Situation Mapping
o EGSE_035 -Thematic Mapping- Context Mapping
o EGSE_036 -Thematic Mapping- Medium Scale
o EGSE_037 - Thematic Mapping- Large Scale
o EGSE_039 - RISK-EOS: Burn Scar Mapping
A summary of the needs from the LMCS as well as other land services is described hereafter
as relevant to Sentinel-2 type of sensors:
○ Data Access needs
Timeliness is a key requirement in case of emergency, with NRT-3h delivery after
sensing for new acquisitions. Some data shall be processed and disseminated in NRT,
with less than 3 hours after sensing, resulting in the need to process the “on-demand”
(i.e. according to the specific requested product) at the Receiving Ground Stations.
Access to reference past products with stringent timeliness result in the necessity to
ensure past products both already useable and ready to be disseminated and that can
be generated “on the fly” from source Level-0 products if necessary.
○ Acquisition tasking needs:
Data requirements are pre-defined for some monitoring activities but the main
characteristic of these services is the need for rush satellite tasking capability to react
quickly to crisis situations. During crisis or emergencies it would thus be justified that
for reacting and tactical purposes, zones with high-risk (e.g. volcanoes, tropical zones
prone to flooding, zones prone to fire, etc) will be handled in NRT mode in a preventive
approach, together with the whole of Europe.
○ Products and quality needs
There is a clear requirement for historical data for comparison with crisis data. L1B or
L1A is often requested although it is unknown whether this choice is motivated by the
fact the L1C is not advertised, or is believed to be available only on-request or after a
significant delay. NRT timeliness is required for crisis data with regular daily post-crisis
monitoring.
Although L1C will be available on-line on the full mission archive (with possibly varying
delivery latencies for data older than about a year), for historical L1A or L1B, it is
proposed an on-line availability for a limited period (e.g. 1 or 2 months). For older data,
the L1B products will be available from long-term storage.
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