Transcript Document

- Rosetta Mission Status
Rita Schulz
Philae Science Team Meeting
Venice, 30 Mar. – 1 Apr. 2009
ROSETTA’s journey to
67P/Churyumov-Gerasimenko
Launch (2 March 2004, from Kourou, French Guyana
Deep-space Manoeuvre, 1st Earth swing-by (4 Mar 2005)
Deep-space Manoeuvre, Mars swing-by (25 Feb 2007)
2nd Earth swing-by (13 Nov 2007)
Steins fly-by (5 Sept 2008)
Deep-space Manoeuvre, 3rd Earth swing-by (13 Nov 2009)
Lutetia fly-by (10 Jun 2010) – 3000 km distance
Deep-space Manoeuvre & start of hibernation (mid-2011) – within 4.5 AU from Sun
Exit from hibernation and Deep-space Manoeuvre (Early 2014) 
 prime science mission begins
Comet Rendezvous (Spring 2014) – between 4.5 AU and 4 AU from Sun
Philae lander deployment (Nov 2014) – 3.25 to 3 AU from Sun
Comet closest approach to the Sun (Aug 2015)
End of Mission (31 Dec 2015)
Rita Schulz
Philae Science Team Meeting
Venice, 30 Mar. – 1 Apr. 2009
Comet Phase Preparations
Three Scientific Working Groups established
Comet pre-landing orbiter observations
Chairpersons: J.P. Bibring, H. Sierks
Comet chemical properties
Chairpersons: C. Engrand, D. Bockelée-Morvan
Comet physical properties: gas, dust, activity
Chairpersons: E. Grün, M. Fulle
Representatives of each instrument are members of each WG.
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Rita Schulz
Philae Science Team Meeting
Venice, 30 Mar. – 1 Apr. 2009
Status of Science Theme Table
All instruments have their science requirements implemented into
the Master Science Themes Table
More than 450 Science Objectives have been defined
Some addressed similar objectives e.g. “Production rates and
spatial distributions of H2O, CO, and CO2” & “Spatial distribution
of H2O molecules” etc
Science Theme Coordinator: Ho Tra-Mi (DLR Bremen)
will meet with WG chair persons to consolidate inputs and
requirements (Mgt. planned for April/May)
Rita Schulz
Philae Science Team Meeting
Venice, 30 Mar. – 1 Apr. 2009
Status of Science Theme Table
(cont.)
Chairpersons of WG2 and WG3 are working on table structures,
consistent terminology, meaningful keywords, etc.
• Cecile E. & Dominique B.-M. coordinate the revision of the table
with Eberhard G., Marco F. and PIs
• Iterate with PI for the validation of the science goals
• Any suggestion of PIs, Instrument teams concerning improvement
of table?
• PS, RSOC and Science Theme Coordinator will review and
validate the changes of the Science Theme Table focusing mainly
on operational aspect of it
Science Theme Table  Data Base & Definition of common and
complementary measurements
of H2O molecules” etc
Rita Schulz
Philae Science Team Meeting
Venice, 30 Mar. – 1 Apr. 2009
Comet Phase Planning Concept
Planning concept, procedures and software required for continuous,
intense science operations are only foreseen for the comet phase
Development has started at RSOC in cooperation with the BepiColombo Science
Ground Segment and the Mission Independent Group.
Science driven automated planning approach.
RSOC and RMOC are working in cooperation on top-level science
operations planning and mission planning concepts, respectively.
Observation
Requests
Presentation to PI teams at SWT in June.
Database
Environmental
Module
Priorities
Payload Module
S/C sub-system
Module
Thermal Module
Slew Estimation
Module
Rita Schulz
Dynamic
Interaction
Science
Opportunity
Analyzer
Planner &
Scheduler
• Environmental Constraints
• Targets and Target Groups
• Pointing Profiles
• Operational Profiles
• Detailed Science Objectives
• Priority
Visualization
Modules
PTR & POR
Generation
Module
Philae Science Team Meeting
Venice, 30 Mar. – 1 Apr. 2009
ISSI Comet Modeling Team
Comet Modeling Tool is available
Set of models for cometary environment
from nucleus to solar wind plasma interaction
Next Meeting: 12-14 May 2009
Main Topics:
Status report of the ICES tool (fixes/improvements, user experience,
features in the next release)
Continued discussion of physical input parameters, species,
and processes that need to be included in ICES in order
to make it useful for the Rosetta science team.
Rita Schulz
Philae Science Team Meeting
Venice, 30 Mar. – 1 Apr. 2009
RSOC Team
 Mike Ashman: Science Operations Engineer
Lead Active PC10.
Experiment interface person for PHILAE and CONSERT.
 Juan Garcia Beteta: Science Operations Engineer
Lead Earth Swingby 3.
 Viney Dhiri: Systems Engineer
Science operations planning software for cruise and comet phase.
 Michael Küppers: Scientist
Science operations planning concept for comet phase.
Lead Lutetia Flyby. Support lead Earth Swingby 3.
 Claire Vallat: Science Operations Engineer
Baseline planning for comet phase. Liaison to Science WGs.
Cruise Phase PC Requirements. Support lead Active PC10.
 Kristin Wirth: Rosetta Science Operations Manager
Rosetta SGS development plan.
Rita Schulz
Philae Science Team Meeting
Venice, 30 Mar. – 1 Apr. 2009
Active Payload Checkout 10 Status
Scenario characteristics:
 Execution time: 19 September - 2 October 2009.
 Delta = 0.34 - 0.25 AU. OWLT only ~ 3 min. rh = 1.30 - 1.22 AU.
 Interactive operations: 10 passes of 7 hrs, i.e. max. 70 hrs available.
 Non-interactive operations: Nominally 4 days = 96 hrs available.
Payload operations requests:
 Interactive operations: 71 hrs 40 min requested (including PHILAE).
 Non-interactive operations:
• 374 hrs 20 min requested (not including PHILAE) >> 96 h available
• ~ 90 hrs with specific pointing requested.
 PHILAE / CONSERT requested 142 hrs including 4 interactive passes.
PC10 is oversubscribed! Solutions:
 Numerous parallel instrument operations needed.
 Scheduling of non-interactive operations between interactive passes.
 Possibly additional non-interactive operations on 18 September.
Rita Schulz
Philae Science Team Meeting
Venice, 30 Mar. – 1 Apr. 2009
PC10 PHILAE Slots (TBC)
: LZ operations
Rita Schulz
Philae Science Team Meeting
Venice, 30 Mar. – 1 Apr. 2009
Earth Swingby 3 Status
 Last planetary swingby of Rosetta.
 Only opportunity to take advantage of highest data rates.
 Earth swingby will be used to realise the flyby geometry for Lutetia.
 Safes fuel compared to later Trajectory Correction Maneuvers.
 Requires final decision about flyby geometry for Lutetia on the
upcoming SWT (June 2009).
 Closest approach 13 Nov. ~07:45 UT, 2480 km above Earth‘s surface.
 Moon closest approach about 8 hours later at 220000 km.
 Remote sensing instruments are going to perform calibrations and PR
observations, RPC will do measurements of the magnetosphere.
 Limited visibility of Rosetta from Earth.
 Closest approach over day side.
 Over night side until shortly before CA, but over Pacific Ocean.
Rita Schulz
Philae Science Team Meeting
Venice, 30 Mar. – 1 Apr. 2009
Steins Fly-by Summary
 Rosetta‘s (and ESA‘s) first asteroid flyby was a success!
 Successful operations at the asteroid by 8 orbiter instruments
and 3 Philae instruments
 Very few minor payload anomalies
 Some issues with autonomous tracking (Asteroid Flyby Mode)
Excellent scientific results.
First results already presented at various conferences and workshops.
Science Exploitation Workshop for PIs took place, 25-28 Feb. 2009
Special session at AGU Spring Meeting, May 24-27, 2009.
Nature papers planned by OSIRIS, VIRTIS, MIRO
Rita Schulz
Philae Science Team Meeting
Venice, 30 Mar. – 1 Apr. 2009
Lutetia Fly-By Constraints
Michael Müller (ESOC/FD)
Requirements:
0 phase angle observation
CA distance as close as possible <=3000km
CA distance >3000km (MIRO)
Pointing offset around CA (SR)
No flip shortly before CA (Rosina)
HGA coverage across CA (RSI)
RSWT, Nov 5rd 2008, Darmstadt, Germany
Rita Schulz
Philae Science Team Meeting
Venice, 30 Mar. – 1 Apr. 2009
Fly-by geometry
(considering 0 phase angle requirements)
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CA 
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zero phase angle
Closest apprach: 2010-07-10
2.7AU heliocentric distance
3AU geocentric distance
15km/s relative velocity
Phase angle at CA 79deg
Phase angle at approach 11deg
scenario recommended by Astrium:
-CA distance: 3055km
( 16000km at zero phase angle)
-AFM exit 20min after CA
-HGA off at CA -10min
-flip hours-days before CA
Sun direction
Rita Schulz
Philae Science Team Meeting
Venice, 30 Mar. – 1 Apr. 2009
Rosetta Book - status
ROSETTA
ESA’s Mission to the Origin of the Solar System
Book finally went into printing
28 February 2009!
Rita Schulz
Philae Science Team Meeting
Venice, 30 Mar. – 1 Apr. 2009