Status of Bepi Colombo Harri Laakso ESAESTEC Code

Status of Bepi. Colombo Harri Laakso ESA/ESTEC, Code SRE-OS, Noordwijk, The Netherlands H. Laakso, SERENA - HEWG meeting, Mykonos, Greece, 8 -11 June 2009 1

Mission Design Overview q Launcher: Ariane 5 q Launch date: 21 -Jul-2014 § MOI date: 21 -May-2020 (5. 8 year cruise to Mercury by electric propulsion) § Backup: 06 -Aug-2015 31 -Oct-2021 (6. 2 years) q Launch strategy: Direct escape § 1 -year Earth-to-Earth transfer q Earth, 2 Venus, 4 Mercury flybys/gravity assists q Gravity capture into Mercury orbit / Final Mercury orbit adjustment by chemical propulsion q Science operations: 1 year nominal plus 1 year extended H. Laakso, SERENA - HEWG meeting, Mykonos, Greece, 8 -11 June 2009 2

Summary of IPDR Results Experi ment BELA ISA MERMA G MERTIS MGNS MIXS MORE PHEBUS SEREN A SIMBIOSYS SIXS DESIGN STATUS ? SCI. PERFORM. INTERFACES - EID B RESOURCES FOPS - OB S/W PA PROGRAMME FUNDG. / SCHEDULE YES NO NO (PA) NO YES NO NO NO (YES) NO IPDR Assessment Delta IPDR H. Laakso, SERENA - HEWG meeting, Mykonos, Greece, 8 -11 June 2009 3

MPO Payload Resources - Mass Experiment Allocation [kg] BELA 12. 0 13. 3 15% 13. 0 12% latest est. 13. 5 - 14 kg, savings being identified ISA 5. 3 5. 7 0% 6. 0 5% savings to be identified MERMAG 1. 8 17% power supply redundancy expected to reduce margin MERTIS 3. 3 8% - MGNS 5. 2 7% regarded small MIXS 7. 3* 7% 8. 8 7% regarded small 1. 5 kg base plate added MORE 3. 5 15% - PHEBUS 6. 6 7. 5 6% savings to be identified SERENA 5. 4 5. 6 0% 6. 3 12% marginal for consortia SIMBIO-SYS 8. 3 15% significant design optimisation pending SIXS 1. 3 2. 0 13% Local radiator added 60. 0 65. 3 8. 5% 68. 0 10% regarded small TOTAL EID B Dr 3 CBE [kg] 10. 1** Declared Margin 10% Post IPDR Alloc. [kg] 10. 6** Margin to Alloc. * excl. 1. 5 kg MIXS base plate; ** excl. thermal straps (S/C) Experiment unit interconnection harness (ca. 6 kg) not included H. Laakso, SERENA - HEWG meeting, Mykonos, Greece, 8 -11 June 2009 Remarks 4

MPO Payload Resources - Power Experiment Allocation [W] EID B Dr 3 CBE [W] BELA 49 36 38 orbital average, full mode 49 W; re-allocation possible ISA 6 12 10 power driven by thermal control MERMAG 5 4. 6 5 - MERTIS 8 13 12 re-allocation TBD MIXS 12 16 14 value is for full mode MGNS 4 4. 5 - MORE 30 37 37 only for orbits with GS contact PHEBUS 4 3. 8 4 orbital average, full mode 23 W SERENA 21 22 22 22. 4 W for full science mode SIMBIO-SYS 23 25 25 32. 5 W for full science mode SIXS 2 2. 5 - TOTAL 2. 5 Re. Allocatio n (TBC) Remarks (allocation is on orbital average) 164 139/176 142/179 operations may be seasonally constraint Operational scenarios under study by SOC; re-allocation pending further assessment Limitation to 100 W baseline for perihelion or certain mission phases H. Laakso, SERENA - HEWG meeting, Mykonos, Greece, 8 -11 June 2009 5

MPO Payload EID-B Status Experiment EID B Status BELA Draft 3 finalised and signed as PDR reference, detailed mech. update pending ISA Draft 3 finalised and signed MERMAG Draft 3 finalised and signed MERTIS Draft 3 finalised and signed MGNS Draft 3 finalised and signed MIXS Draft 3 finalised and signed, update required for base-plate implementation MORE Draft 3 finalised and signed PHEBUS Draft 3 finalised and signed SERENA Draft 3 finalised and signed, possible update needed for optimised accommodation SIMBIO-SYS Draft 3 finalised and signed, significant update expected for potential new configuration SIXS Draft 3 finalised and signed, Draft 4 for radiator optimisation in work EID B Issue 1 with configuration control to come by summer / early autumn this year !! H. Laakso, SERENA - HEWG meeting, Mykonos, Greece, 8 -11 June 2009 6

MPO Payload Priorities q Open P/L procurement issues: § Solutions to be addressed without delay q Firm up and finalise P/L experiment interface definition for H/W phase: § Partly achieved, but still missing elements § Consolidation to be addressed without delay q P/L accommodation and local interfaces to be confirmed and detailed: § Ongoing activity, as part of PDR with minor adjustments only § H/W phase comes upon us, and requires significant more attention to detailed work and close interaction and reporting q In view of the above and the observed IPDR results: § Please stop “nice-to-have” optimisation dreams § Keep momentum and intensify P/L work § Adopt the “Yes We Can” attitude – also we got to get out of a crisis ! H. Laakso, SERENA - HEWG meeting, Mykonos, Greece, 8 -11 June 2009 7

Critical Equipment Review - 2008 q The Critical Equipment Review was held between September-December 2008 § Critical technological elements were reviewed § Highly useful exercise and confirmed many technologies that are not considered critical any more § Some remained open and were further studied in spring 2009, such as solar arrays, antenna pointing mechanism and wave guide q The CER board met on 18 December 2008 q Recommended to start the PDR activity q Recommended that Collocation Meeting should be organized only after the test results on the solar array are available q Gave critical notes on the mass traceability and maturity of technology for solar array, antenna pointing mechanism and waveguides H. Laakso, SERENA - HEWG meeting, Mykonos, Greece, 8 -11 June 2009 8

PDR Activities and Issues q The PDR Kick-Off was held on 10 March § The CER Board provided guidance to the review team and recommendations on work by the Prime before collocation § The SPC Tracking Committee follows the PDR and advises the SPC q Major items were: § Overall mass budget with increasing trend remains a major concern (10% margin!) § S/W and AOCS complexity and development schedule § AIV (accessibility of equipment, schedule) § Solar Array § Contamination risk by thruster plumes q Collocation meeting with Astrium on 4 – 7 May q The PDR Board meeting on 29 May H. Laakso, SERENA - HEWG meeting, Mykonos, Greece, 8 -11 June 2009 9

PDR Results q Preliminary draft recommendations of the PDR board are not yet public q The PDR Board recognized significant development accomplished during the past 12 months § The board believes strongly that Bepi. Colombo will fly § Solar arrays are adequate for the Mercury environment and are currently tested for ü at 200 C for 10 000 hrs ü at 230 C for 5 000 hrs § The results confirmed the expectations of solar cell aging q The PDR Board will reconvene in September to discuss the remaining key issues, such as mass and solar array § Final PDR meeting in November is for closing the RIDs and AIs q The Bepi. Colombo Ca. C needs to be confirmed after the summer in order to issue the SPC paper in September for the SPC meeting on 2 October 2009 H. Laakso, SERENA - HEWG meeting, Mykonos, Greece, 8 -11 June 2009 10

MMO Status q Manufacturing of STM is in final stage at JAXA, test preparations on-going q Tests on EM are on-going q On-board S/W requirements review completed q Launcher coupled load analysis confirmed acceptable notching profile q Characterization tests of thermal hardware and solar cells are on-going q Issue: Solar array appears to have too little margin to cover UV degradation, temperature uncertainties and modified cosine law. Addition of one solar cell string is under consideration (MMO height increase of 16 cm) H. Laakso, SERENA - HEWG meeting, Mykonos, Greece, 8 -11 June 2009 11