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GSC Sentinel-2 PDGS OCD - Emits - ESA

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<strong>GSC</strong> <strong>Sentinel</strong>-2 <strong>PDGS</strong> <strong>OCD</strong><br />

Issue 1 Revision 2 (draft) - 25.07.2010<br />

GMES-GSEG-EOPG-TN-09-0008<br />

page 301 of 350<br />

This operation scenario allows the understanding of the system capabilities usage and allows<br />

evaluation for potential mission scenario evolutions. As such, resources like the MSI usage<br />

(i.e. sensing times segments length), on-board memory usage, downlink times, on board data<br />

latency, etc. are evaluated and relevant statistics are generated.<br />

In this manner, the generation of the mission plan according to different rules can be<br />

assessed to see potential bottlenecks, improvements, and in general, aiding the operator and<br />

in last instance the POM on a better mission planning definition.<br />

6.16 Mission Performance Assessment (MPA) Operations<br />

6.16.1 PRINCIPLES<br />

6.16.1.1 MPA Decomposition<br />

The <strong>PDGS</strong> Mission Performance Assessment (MPA) function is responsible to verify that the<br />

mission requirements are being met. Accordingly, the MPA function will cope with various and<br />

different aspects of the mission operations:<br />

‣ Off-line quality control of the MSI production;<br />

‣ Definition of the MSI on-board configuration and calibration;<br />

‣ Definition of the processing and quality control configuration parameters;<br />

‣ End-to-end system performance monitoring.<br />

Such activities may require different work-flows definition and involve different teams,<br />

therefore the MPA function operations scenarios presented in this section are grouped<br />

according to this decomposition.<br />

6.16.1.2 Off-line Quality Control<br />

The Off-line Quality Control (OFQC) is responsible of identifying if the mission data quality<br />

requirements are being met on the generated production along mission life-time and to<br />

monitor the quality indicators trends evolution in time.<br />

The OFQC includes the monitoring of instrument response and the generated product data<br />

quality at regular intervals to guarantee the timely identification of any instrument or product<br />

quality anomaly.<br />

As a result of the quality control activities performed during the production generation, the<br />

products are annotated with Quality Indicators (QI), which provide the information to assess<br />

the suitability of the data for a particular use/application. Therefore the Off-line Quality Control<br />

(OFQC) complements and synthesises the On-line Quality Control (OLQC) function results<br />

(cf. section 6.4).<br />

The Off-line Quality Control is conceived to detect anomalies that cannot be detected by the<br />

On-line Quality Control function due to the need of an overall view on the generated<br />

production instead of a product-per-product level.<br />

<strong>ESA</strong> UNCLASSIFIED – For Official Use<br />

© <strong>ESA</strong><br />

The copyright of this document is the property of <strong>ESA</strong>. It is supplied in confidence and shall not be reproduced, copied or<br />

communicated to any third party without written permission from <strong>ESA</strong>.

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