4 Final Report - Emits - ESA

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