Philae Science Team Meeting Venice, 30 Mar. – 1 Apr Rita Schulz - Rosetta - Mission Status

Philae Science Team Meeting Venice, 30 Mar. – 1 Apr Rita Schulz ROSETTA’s journey to 67P/Churyumov-Gerasimenko Launch (2 March 2004, from Kourou, French Guyana Deep-space Manoeuvre, 1 st Earth swing-by (4 Mar 2005) Deep-space Manoeuvre, Mars swing-by (25 Feb 2007) 2 nd Earth swing-by (13 Nov 2007) Steins fly-by (5 Sept 2008) Deep-space Manoeuvre, 3 rd 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)

Philae Science Team Meeting Venice, 30 Mar. – 1 Apr Rita Schulz 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..

Philae Science Team Meeting Venice, 30 Mar. – 1 Apr Rita Schulz 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)

Philae Science Team Meeting Venice, 30 Mar. – 1 Apr Rita Schulz 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

Philae Science Team Meeting Venice, 30 Mar. – 1 Apr Rita Schulz 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. Presentation to PI teams at SWT in June.

Philae Science Team Meeting Venice, 30 Mar. – 1 Apr Rita Schulz ISSI Comet Modeling Team Comet Modeling Tool is available Set of models for cometary environment from nucleus to solar wind plasma interaction Next Meeting: 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.

Philae Science Team Meeting Venice, 30 Mar. – 1 Apr Rita Schulz 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.

Philae Science Team Meeting Venice, 30 Mar. – 1 Apr Rita Schulz Active Payload Checkout 10 Status Scenario characteristics:  Execution time: 19 September - 2 October  Delta = AU. OWLT only ~ 3 min. rh = 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.

Philae Science Team Meeting Venice, 30 Mar. – 1 Apr Rita Schulz PC10 PHILAE Slots (TBC) : LZ operations

Philae Science Team Meeting Venice, 30 Mar. – 1 Apr Rita Schulz 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 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.

Philae Science Team Meeting Venice, 30 Mar. – 1 Apr Rita Schulz  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) Steins Fly-by Summary Excellent scientific results. First results already presented at various conferences and workshops. Science Exploitation Workshop for PIs took place, Feb Special session at AGU Spring Meeting, May 24-27, Nature papers planned by OSIRIS, VIRTIS, MIRO

Philae Science Team Meeting Venice, 30 Mar. – 1 Apr Rita Schulz 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 5 rd 2008, Darmstadt, Germany

Philae Science Team Meeting Venice, 30 Mar. – 1 Apr Rita Schulz  Closest apprach:  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 CA Fly-by geometry (considering 0 phase angle requirements) zero phase angle

Philae Science Team Meeting Venice, 30 Mar. – 1 Apr Rita Schulz Rosetta Book - status ROSETTA ESA’s Mission to the Origin of the Solar System Book finally went into printing 28 February 2009!