GSC Sentinel-2 PDGS OCD - Emits - ESA

ESA UNCLASSIFIED – For Official Use
GSC Sentinel-2 PDGS OCD
Issue 1 Revision 2 (draft) - 25.07.2010
GMES-GSEG-EOPG-TN-09-0008
page 302 of 350
According to this overall view on the production quality trends and associated instrument level
performance, the Off-line Quality Control (OFQC) scope is:
o To identify any potential anomaly arising from the MSI instrument down to the
processing chain and which may require corrective actions as soon as possible after
data acquisition;
o To perform a short-term and long-term mission performance monitoring including the
verification of the consistency between expected mission products, generated mission
products and auxiliary information usage;
o To perform long-term instrument performance monitoring including the monitoring over
the long-term of key instrument performance parameters annotated on or derived from
the mission data product;
o To perform long-term product quality monitoring, which includes the monitoring of the
product quality key parameters annotated on or derived from the mission data
products;
o To perform automatic checks on the auxiliary data format compliance (e.g. DEM, GRI,
etc) prior to the official release and usage.
The OFQC role is to detect any anomalies according to the presented scope and report them
accordingly. The potential mitigations and solutions of the raised anomalies fall out of the
scope of the OFQC but on other elements of the MPA function as explained in the next
sections.
6.16.1.3 Calibration and Validation
The Cal/Val corresponds to the process of updating and validating on-board and on-ground
processing configuration data (respectively OBCD and OGCD) to ensure meeting product
data quality requirements (cf. section 2.4 for detailed of the Cal/Val terminology according to
CEOS definitions). The Cal/Val operations for Sentinel-2 are described in section 4.5.4.10.
The MPA function as result of the performed Cal/Val activities will generate updates on the
MSI on-board configuration data (OBCD) to tweak and tune its performance. Accordingly it
will be responsible of the updates of the following MSI tables:
‣ IPS (7 tables, one per each MSI imaging mode)
‣ TCM-NOM
‣ TCM-SBY
‣ Front-End Electronics
‣ NUC
Analogous to the update of the on-board configuration, the MPA function as result of the
Cal/Val activities will generate updates on the on-ground processing configuration (OGCD)
which for Level-0/1 processing are the GIPP) to tweak and tune its performance.
The update of the OBCD and OGCD is usually done in parallel as the update of one on-board
configuration may have impact on the manner the processing is performed on ground. The
MPA function generates both updates although it is the MCC function (cf. section 6.14) that
ensures the coordinated activation of the on-board and on-ground configuration.
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