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Status of the Rosetta Project TestBed (PTB)

Status of the Rosetta Project TestBed (PTB). ESA/Estec 6 December 2001. P. van der Plas Modelling and Simulation Section ESA/ESTEC. Rosetta Project TestBed (PTB). Simulator supporting Rosetta Science Operations Real-time simulation core with variety of models

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Status of the Rosetta Project TestBed (PTB)

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  1. Status of the RosettaProject TestBed (PTB) ESA/Estec6 December 2001 P. van der Plas Modelling and Simulation Section ESA/ESTEC Rosetta SOWG

  2. Rosetta Project TestBed (PTB) • Simulator supporting Rosetta Science Operations • Real-time simulation core with variety of models • Capable of generating S/C trajectory and attitude • Capable of importing S/C trajectory and attitude • Capable of generating input data for the EPS • Capable of simulating experiment operations • Extensive visualisation capabilities (3D, maps) Rosetta SOWG

  3. The Rosetta mission • January 2003 Launch • August 2005 Mars fly-by • November 2005 Earth fly-by #1 • June 2006 Otawara fly-by • November 2007 Earth fly-by #2 • July 2008 Siwa fly-by • March 2011 Wirtanen arrival Rosetta SOWG

  4. Complete Mission Scenario Rosetta SOWG

  5. Earth Escape Scenario Rosetta SOWG

  6. Mars Fly-by Scenario Rosetta SOWG

  7. Asteroid Fly-by Scenarios Rosetta SOWG

  8. Comet Scenario Rosetta SOWG

  9. Current PTB Status • Earth (and Moon), Mars (and Phobos/Deimos), Siwa, Otawara and Wirtanen models available • All mission phases implemented • Star catalogue (up to 100,000 stars) including constellations for experiment FOV analysis • EPS software v0.5 integrated (event generation, simulation of experiment operations) • Pointing Request (PTR) execution completed Rosetta SOWG

  10. PTR Execution • Goal: • To support analysis of pointing opportunities and to assess feasibility of pointing timelines • To reduce the iteration time between the RSOC and the FD team in constructing pointing timelines in combination with the experiment operations • Interface: The Pointing Request (PTR) file format Rosetta SOWG

  11. PTR File Format • PTR modes: INERT, NADIR, TRACK and LIMB • Time based or event based • Predefined database of celestial objects, landmarks on target bodies (e.g. the Moon, Wirtanen) • PTB will perform various levels of error checking • Goal: To produce a feasible pointing request timeline that can be processed in detail by the FD team • Execution including simple slew computations Rosetta SOWG

  12. PTR File Example Ref_date: 27-August-2005_05:01:40 Start_time: 00:00:00 End_time: 1_00:00:00 # Pointing slot 0 0_00:00:00 RSOC INERT ( \ SLEW_POLICY = BEFORE_NEXT \ DURATION = 1000.0 [seconds] \ OBJECT = Polaris) # Pointing slot 1 0_00:35:00 RSOC TRACK ( \ SLEW_POLICY = IMMEDIATE \ DURATION = 600 [seconds] \ REF_BODY = Phobos \ OBJECT = PhobosLM1) # Pointing slot 2 0_00:51:40 RSOC NADIR ( \ SLEW_POLICY = SMOOTH \ DURATION = 400 [seconds] \ POSITION_ANGLE = 90.0 [degrees] \ OFFSET_ANGLE = 5.0 [degrees] \ FRAME = EME) Rosetta SOWG

  13. Future PTB Improvements • Improving the comet model, supporting irregular shaped bodies • Extending the 3D visualisation, e.g. displaying sequences of images in 3D • Integrating new EPS versions, displaying experiment information in real-time (modes, states), adding events to be generated • Etc, etc… Rosetta SOWG

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