4 Final Report - Emits - ESA

TOC Final
Table of Content
Report
Distribution List..........................................................................................................i
Change Record.........................................................................................................iii
Table of Content ........................................................................................................v
1 Introduction ...................................................................................................1-1
1.1 Scope of the document...........................................................................................................1-1
1.2 References ............................................................................................................................... 1-2
1.2.1 Applicable Documents ........................................................................................................... 1-2
1.2.2 Reference Documents ........................................................................................................... 1-2
2 Product and Mission Baseline Description.................................................2-1
2.1 Overview................................................................................................................................... 2-1
2.2 Survey for Mission Objectives ............................................................................................... 2-1
2.3 Mission Objectives .................................................................................................................. 2-3
3 System Requirements and Mission Scenarios .........................................3-12
3.1 System Requirements........................................................................................................... 3-12
3.2 Major System Trade-Offs...................................................................................................... 3-17
3.3 Mission Scenarios ................................................................................................................. 3-18
3.3.1 Mission Scenario Baseline................................................................................................... 3-19
3.4 Cloud Coverage Analysis ..................................................................................................... 3-22
4 Mission and System Level Analyses .........................................................4-27
4.1 Mission Architecture............................................................................................................. 4-27
4.2 Mission Analysis ................................................................................................................... 4-27
4.3 Payload................................................................................................................................... 4-29
4.3.1 Imaging capability ................................................................................................................ 4-29
4.3.2 Radiometric & image quality performances......................................................................... 4-30
4.3.3 Instrument design ................................................................................................................ 4-33
4.3.4 PLM budgets........................................................................................................................ 4-42
4.4 Line of Sight (LoS) Stabilisation Concepts......................................................................... 4-43
4.4.1 LoS stabilisation main issues: microvibrations and post-integration ................................... 4-43
4.4.2 Microvibrations..................................................................................................................... 4-44
4.4.3 Post-integration.................................................................................................................... 4-46
4.5 Satellite................................................................................................................................... 4-48
4.5.1 Configuration........................................................................................................................ 4-48
4.5.2 Electrical Architecture .......................................................................................................... 4-51
4.5.3 Power Subsystem ................................................................................................................ 4-52
4.5.4 Payload Data Handling and Transmission........................................................................... 4-53
4.5.5 Telemetry and Telecommand .............................................................................................. 4-56
4.5.6 Attitude and Orbit Control .................................................................................................... 4-58
4.5.7 Propulsion System ...............................................................................................................4-66
4.5.8 Structure and Thermal Concept........................................................................................... 4-72
4.5.9 Satellite Budgets .................................................................................................................. 4-77
4.6 Ground Segment ................................................................................................................... 4-77
4.6.1 Ground Segment Architecture ............................................................................................. 4-77
4.6.2 Geo-Oculus dedicated Ground Segment issues ................................................................. 4-80
Doc. No: GOC-ASG-RP-002 Page v
Issue: 2
Date: 13.05.2009 Astrium GmbH