GSC Sentinel-2 PDGS OCD - Emits - ESA

○ Effective processing resources usage (i.e. CPU and memory usage);
GSC Sentinel-2 PDGS OCD
Issue 1 Revision 2 (draft) - 25.07.2010
GMES-GSEG-EOPG-TN-09-0008
page 211 of 350
○ Allow simultaneous instances execution to achieve processing parallelization;
○ Compatibility with the DPC interfaces for commanding & control and data input/output.
5.2.3.3.3 Function Interfaces
The following function interfaces are identified for the IDP function:
○ The DPC function commanding & control interface for the IDP execution management;
○ The DPC function data input and output interfaces for processing job input and output
data flows;
○ M&C interface for status monitoring;
5.2.3.4 MSI Decompression Software (MDS) Function
5.2.3.4.1 Function Objectives and High-Level Description
The MDS function is responsible for providing to the IDP function, and more generally to any
third-party entity such as the LGSs, with the capability to handle and decompress Sentinel-2
MSI on-board compressed raw-data. In addition to the capability of fully decompressing the
image, the decompression software shall be able to extract the low-frequency image content
in order to quickly generate an under-sampled image.
5.2.3.4.2 Design Drivers and Constraints
The following drivers and constraints are identified for this function:
○ Maximum reuse of an existing software components developed for Pleiades and
Astroterra missions (known as MRCPBG);
○ Long-term maintainability and portability (>40 years) is required to meet Sentinel-2
LTDP objectives defined in section 4.3.5.2.
5.2.3.4.3 Function Interfaces
The MDS function will be interfaced directly at software level through a well-defined API
provided in compiled form.
Software distribution will be ensured through a dedicated internet interface (e.g. a web-site).
5.2.3.5 On-Line Quality Control (OLQC) Function
5.2.3.5.1 Function Objectives and High-Level Description
The OLQC function is responsible to perform the systematic and real-time essential data
analysis and anomaly detection over all Sentinel-2 PDGS elaborated PDIs. As part of the
Sentinel-2 PDGS products generation activities, the OLQC function will generate Quality
Indicators (QI) as required to:
ESA UNCLASSIFIED – For Official Use
© ESA
The copyright of this document is the property of ESA. It is supplied in confidence and shall not be reproduced, copied or
communicated to any third party without written permission from ESA.