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ROSETTA RSI : Rosetta Radio Science Investigations Experiment User Manual Document RO -RSI -IGM -MA -3081 Issue: 4 Revision: 2 Date: 25.04.2016 Page: 1 of 144

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ROSETTA RSI : Rosetta Radio Science Investigations Experiment User Manual Document RO -RSI -IGM -MA -3081 Issue: 4 Revision: 2 Date: 25.04.2016 Page: 1 of 144 ROSETTA RSI : Rosetta Radio Science Investigations Experiment User Manual Document RO -RSI -IGM -MA -3081 Issue: 4 Revision: 2 Date: 25.04.2016 Page: 1 of 144 ROSETTA Radio Science Investigations (RSI) Experiment User Manual Reference: RO-RSI-IGM-MA-3081 Issue: 4 Revision: 2 Rheinisches Institut für Umweltforschung, Abt. Planetenforschung Universität zu Köln Aachenerstr 209 D-50931 Köln Prepared by: ________________________________ ______________________________ Silvia Tellmann, Experiment Manager Approved by: __________________________________________ Martin Pätzold, Principal Investigator ROSETTA RSI : Rosetta Radio Science Investigations Experiment User Manual Document RO -RSI -IGM -MA -3081 Issue: 4 Revision: 2 Date: 25.04.2016 Page: 2 of 144 PAGE LEFT FREE ROSETTA RSI : Rosetta Radio Science Investigations Experiment User Manual Document RO -RSI -IGM -MA -3081 Issue: 4 Revision: 2 Date: 25.04.2016 Page: 3 of 144 Contents 1 Introduction ........................................................................................................ 10 1.1 Purpose ...................................................................................................... 10 1.2 Scope ......................................................................................................... 10 1.3 Applicable Documents ................................................................................ 10 1.4 Referenced Documents .............................................................................. 10 1.5 Abbreviations.............................................................................................. 11 2 An Introduction to Radio Science ...................................................................... 14 2.1 Introduction ................................................................................................ 14 2.2 Background ................................................................................................ 14 2.3 Technique .................................................................................................. 17 3 Mission Characteristics ...................................................................................... 20 3.1 Scientific Objectives of the Rosetta RSI Experiment .................................. 20 Primary Scientific Objectives ............................................................................. 20 Secondary Scientific Objectives ........................................................................ 21 3.1.1 Gravity: Cometary Mass and bulk density ........................................... 21 3.1.2 Gravity: Cometary Gravity Field Coefficients ....................................... 23 3.1.3 Gravity: Cometary Moments of Inertia ................................................. 24 3.1.4 Gravity: Cometary Orbit....................................................................... 25 3.1.5 Nucleus: Surface (Bistatic Radar) ....................................................... 25 3.1.6 Nucleus: Internal Structure .................................................................. 27 3.1.7 Nucleus: Size and Shape .................................................................... 27 3.1.8 Coma: Plasma and Dust Content ........................................................ 27 3.1.9 Coma: Mass Flux ................................................................................ 28 Asteroids: Mass and Bulk Density.................................................................. 28 3.1.10 ................................................................................................................ 28 3.1.11 Solar Corona ....................................................................................... 31 3.2 Overview of the Instrument: Space Segment ............................................. 31 3.2.1 General ............................................................................................... 31 3.2.2 Definition of Radio Links...................................................................... 32 3.2.3 Radio Link Budget ............................................................................... 33 3.2.4 Radio Link Mode and Scientific Objective Cross Reference ............... 34 3.3 Overview of the Instrument: Ground Segment ........................................... 35 3.3.1 Overview ............................................................................................. 35 3.3.2 Ground Stations .................................................................................. 35 3.3.3 Ground Station Capabilities ................................................................. 35 3.3.4 Observed Quantities ........................................................................... 36 3.4 Data Products............................................................................................. 39 3.4.1 Introduction ......................................................................................... 39 3.4.2 Data types ........................................................................................... 39 3.4.3 Data required from ESOC and JPL .................................................... 39 3.4.4 Data Volume Calculation .................................................................... 46 3.4.5 End-to-End performance ..................................................................... 48 4 Experiment Operations ...................................................................................... 53 4.1 Definitions and Configurations.................................................................... 53 4.1.1 Spacecraft and Ground Station configurations .................................... 53 4.1.2 ONES .................................................................................................. 53 ROSETTA RSI : Rosetta Radio Science Investigations Experiment User Manual Document RO -RSI -IGM -MA -3081 Issue: 4 Revision: 2 Date: 25.04.2016 Page: 4 of 144 4.1.3 ONED .................................................................................................. 54 4.1.4 TWOS ................................................................................................. 55 4.1.5 TWOD ................................................................................................. 55 4.2 RSI Operational Procedures ...................................................................... 57 4.2.1 PCx Passive or Active Checkout Number x ......................... 57 4.2.2 CMD Center of mass determination .................................................. 58 4.2.3 DOT Doppler Tracking ...................................................................... 58 4.2.4 GMC Gravity Mapping Campaign ..................................................... 59 4.2.5 OCP Occultation Operations Procedures ........................................... 59 4.2.6 BRP Bistatic Radar Procedures ......................................................... 60 4.2.7 AST Asteroid Flyby Procedures ......................................................... 60 4.2.8 SCP Solor Corona Procedure ............................................................ 60 HGA Pointing Requirements ............................................................................. 61 4.3 ......................................................................................................................... 61 4.3.1 Overview ............................................................................................. 61 4.3.2 Earth inertial pointing .......................................................................... 61 4.3.3 Comet pointing .................................................................................... 61 4.3.4 Phase center pointing ......................................................................... 61 4.4 Mapping of Science Objectives to Operational Procedures ....................... 63 4.5 Functions: Space Segment ........................................................................ 64 4.5.1 Design and Functional Description of the RF Subsystem ................... 64 4.6 Functions: Ground Segment ...................................................................... 66 4.6.1 Overview ............................................................................................. 66 4.6.2 Deep Space Network .......................................................................... 72 5 RSI Interface with RMOC .................................................................................. 81 5.1 Operation Procedure Request .................................................................... 81 5.1.1 EPS syntax .......................................................................................... 81 5.2 Data retrieval .............................................................................................. 94 5.3 Interface JPL/RSI ....................................................................................... 94 6 Detailed Descriptions of Operational Procedures .............................................. 96 6.1 Overview .................................................................................................... 96 6.2 PCx: Passive Checkout Number x ............................................................. 97 6.2.1 Objective ............................................................................................. 97 6.2.2 Operations ........................................................................................... 97 6.3 CMD: Center of Mass Determination .......................................................
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