4 Final Report - Emits - ESA

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3 Final Report 3 System Requirements and Mission Scenarios 3.1 System Requirements The system requirements for Geo-Oculus have been derived from user and product requirements, iterated during the first part of this study and documented within the System Requirements Report, RD [3]. These requirements have been further evolved after MTR. Within this chapter, a summary of the driving requirements is given. Major Challenges for the Geo-Oculus Mission The unprecedented high resolution combined with large areas to be covered within a short period of time drives the system concept of Geo-Oculus. The high resolution requires a large telescope diameter and high pointing stability, whereas the coverage drives the detector Field of View and short repeat cycles ask for short manoeuvre times. A large numbers of required channels drives the instrument optics and focal plane assembly (number of detectors and filter wheel), whereas the MTF and SNR requirements ask for image post-integration techniques. Definition of Missions Six mission objectives are defined as follows: Primary objectives: • Mission objective 1: Disaster Monitoring; • Mission objective 2: Fire Monitoring; • Mission objective 3: Algal Bloom Detection / Monitoring; • Mission objective 4: Water Quality Monitoring with respect to European Regulation. Secondary objectives: • Mission objective 5: Oil Slick Environmental Information; • Mission objective 6: Erosion / Sediment Transport on the European Shoreline Monitoring. Both primary and secondary mission objectives are considered for the system requirements definition. In order to derive system observation requirements, these six defined missions objectives are compared in terms of system driving requirements (observation cycle, coverage requirements, etc.), see following table. Page 3-12 Doc. No: GOC-ASG-RP-002 Issue: 2 Astrium GmbH Date: 13.05.2009
3 Final Report Table 3.1-1: Geo-Oculus mission objectives Mission objective 1 - Disaster Monitoring 2 - Fire Monitoring 3 - Algal Bloom Detection / Monitoring 4 - Water Quality Monitoring Observation cycle Coverage Observation time / period Goal Threshold Goal Threshold 1 hour 2 days Land areas (on demand) 10 min 1 hour Land areas (on demand) 1 day 3 days Full coverage of European coastlines 1 day 3 days Full coverage of European coastlines 5 - Oil Slick 1 hour 6 hour Specific areas of European coastlines (on demand) 6 - Erosion / Sediment Transport 1 hour 6 hour Specific areas of European coastlines (on demand) SZA
Page 1: Geo-Oculus: A Mission for Real-Time
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