- Rosetta - Mission Status

Philae Science Team MeetingVenice, 30 Mar. – 1 Apr. 2009Rita Schulz

- Rosetta - - Rosetta -

Mission StatusMission Status


ROSETTA’s journey to 67P/Churyumov-Gerasimenko

Launch (2 March 2004, from Kourou, French GuyanaDeep-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 distanceDeep-space Manoeuvre & start of hibernation (mid-2011) – within 4.5 AU from SunExit from hibernation and Deep-space Manoeuvre (Early 2014)

prime science mission beginsComet Rendezvous (Spring 2014) – between 4.5 AU and 4 AU from SunPhilae lander deployment (Nov 2014) – 3.25 to 3 AU from SunComet closest approach to the Sun (Aug 2015) End of Mission (31 Dec 2015)


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.

.


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)


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


Science Opportunity

Analyzer

• Environmental Constraints• Targets and Target Groups• Pointing Profiles• Operational Profiles• Detailed Science Objectives• Priority

Observation Requests

DatabaseEnvironmental

Module

Payload Module

S/C sub-system Module

Thermal Module

Slew Estimation Module

Planner & Scheduler

PTR & POR Generation

Module

Visualization Modules

Dynamic Interaction

Priorities

Comet Phase Planning ConceptPlanning 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.


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.


RSOC Team Mike Ashman: Science Operations Engineer

Lead Active PC10.Experiment interface person for PHILAE and CONSERT.

Juan Garcia Beteta: Science Operations EngineerLead Earth Swingby 3.

Viney Dhiri: Systems EngineerScience operations planning software for cruise and comet phase.

Michael Küppers: ScientistScience 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 ManagerRosetta SGS development plan.


Active Payload Checkout 10 StatusScenario 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.


PC10 PHILAE Slots (TBC)

: LZ operations


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.


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, 25-28 Feb. 2009

Special session at AGU Spring Meeting, May 24-27, 2009.

Nature papers planned by OSIRIS, VIRTIS, MIRO


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


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

CA

Fly-by geometry(considering 0 phase angle requirements)

zero phase angle


Rosetta Book - status

ROSETTAESA’s Mission to the Origin of the Solar System

Book finally went into printing 28 February 2009!

Documents

- Rosetta - Mission Status