DOC : GG-AD-ALTEC-0001 GG ISSUE : 1 GROUND SEGMENT DATE : 05/03/09 The Italian Gateway to ISS PAGE : 2 of 66 DOCUMENT CHANGE RECORD ISSUE DATE REASON FOR CHANGE AFFECTED PARAGRAPHS 1 05/03/09 IRR delivery All DOC : GG-AD-ALTEC-0001 GG ISSUE : 1 GROUND SEGMENT DATE : 05/03/09 The Italian Gateway to ISS PAGE : 3 of 66 TABLE OF CONTENTS 1. SCOPE AND APPLICABILITY ......................................................................................... 7 1.1 Scope......................................................................................................................................7 1.2 Applicability ..........................................................................................................................7 2. REFERENCES ...................................................................................................................... 8 2.1 Normative References............................................................................................................8 2.2 Informative references ...........................................................................................................9 2.3 SysML convention...............................................................................................................10 3. DEFINITIONS AND ABBREVIATIONS ........................................................................ 15 3.1 Definitions............................................................................................................................15 3.2 Abbreviations.......................................................................................................................15 4. MISSION DESCRIPTION AND GROUND SEGMENT OVERVIEW........................ 17 4.1 Mission description..............................................................................................................17 4.1.1 Experiment Overview........................................................................................................17 4.1.2 Payload overview ..............................................................................................................17 4.1.3 Spacecraft overview ..........................................................................................................18 4.1.3.1 Mechanical Electric and Thermal Architecture ..............................................................18 4.1.3.2 On-board Data Handling.................................................................................................19 4.1.3.3 AOCS..............................................................................................................................20 4.1.3.3.1 Micronewton Thrusters ................................................................................................20 4.1.3.3.2 Auxiliary Propulsion ....................................................................................................20 4.1.3.3.3 Spin Rate Sensor ..........................................................................................................20 4.2 Mission operation concept overview ...................................................................................20 4.3 Ground segment overview ...................................................................................................22 5. MISSION CONSTRAINS AND IMPLEMENTATION ASSUMPTION...................... 27 5.1 Mission constrains ...............................................................................................................27 5.1.1 Preparation and programming of the measurements.........................................................27 5.1.2 Recording, downloading and transmission of the data......................................................27 5.1.3 Processing, calibration and distribution of the scientific data...........................................28 5.1.4 Operational ........................................................................................................................28 5.2 Ground segment implementation assumption......................................................................28 5.2.1 General ..............................................................................................................................29 5.2.2 System ...............................................................................................................................29 5.2.3 Operations .........................................................................................................................29 5.2.4 Flight Dynamics ................................................................................................................29 6. GROUND SEGMENT INTERFACES ............................................................................. 31 6.1 Interfaces to space segment .................................................................................................31 6.2 Interfaces to launch segment................................................................................................31 6.3 Interfaces to the SOCC ........................................................................................................31 6.4 Interfaces to Support Facilities ............................................................................................32 7. PRE-LAUNCH SUPPORT AND IMPLEMENTATION................................................ 33 7.1 Mission analysis and system studies....................................................................................33 7.1.1 Launcher identification......................................................................................................33 DOC : GG-AD-ALTEC-0001 GG ISSUE : 1 GROUND SEGMENT DATE : 05/03/09 The Italian Gateway to ISS PAGE : 4 of 66 7.1.2 Mission phases and scenario .............................................................................................33 7.1.3 Orbit analysis.....................................................................................................................35 7.1.4 Data budget........................................................................................................................35 7.2 Ground System design and implementation ........................................................................35 7.3 Operations preparation.........................................................................................................37 7.4 Ground segment integration, verification and validation ....................................................39 7.5 Operational validation..........................................................................................................40 8. MISSION OPERATIONS .................................................................................................. 41 8.1 Mission planning and scheduling.........................................................................................41 8.2 Mission implementation.......................................................................................................42 8.3 health monitoring.................................................................................................................43 8.4 Performance monitoring and evaluation..............................................................................43 8.5 Flight dynamics....................................................................................................................43 8.6 Mission products management ............................................................................................44 8.6.1 Smooth transition across mission phases ..........................................................................44 8.7 On-board software maintenance ..........................................................................................45 8.8 Other mission-specific operations functions........................................................................45 8.8.1 Ground segment training...................................................................................................45 9. GROUND SEGMENT SYSTEMS AND FACILITIES................................................... 46 9.1 Ground stations system........................................................................................................46 9.2 Ground Communication Subnet ..........................................................................................48 9.3 Mission Operations Control Centre .....................................................................................50 9.3.1 Data Transfer System (DTS).............................................................................................51 9.3.2 Mission Control System (MCS) ........................................................................................52 9.3.2.1 TM Acquisition...............................................................................................................55 9.3.2.2 TM processing ................................................................................................................55 9.3.2.3 TM Monitoring Displays and Performance evaluation ..................................................55 9.3.2.4 Data Archive and Retrieve (DAR)..................................................................................56 9.3.2.5 OBSW management........................................................................................................56 9.3.2.6 Commanding...................................................................................................................57