MMO-SWG #3 [Mar 22 2006]

PA (Safety & Mission Assurance) Activities for MMO

➢ MMO PA Plan was developed, and it will be distributed to MMO Contractors & Payload teams for review soon.

➢ JAXA will have a JAXA phase 0 Safety Review 24 March 2006. Hazards and their causes will be identified for this review.

* JAXA will apply its System Safety Requirements (JMR-001B) and JAXA Launch Vehicle Payload Safety Requirements (JMR-002B) for Phase 0-1 Safety Review.

* Launch Site Safety Requirements and Transportation Vehicle (Soyuz) Safety Requirements will be applied for the next MMO Phase 1 Safety Review scheduled 2007.

MMO-SWG #3 [Mar 22 2006]

JAXA Phase 0 Safety Review

Potential Risks related to Payloads

*Extendible units : MAST, WPT & MEFISTO- Unintentional extension > ‘Double switch, Triple CMD’

Latch mechanism, etc.

*HV units : MPPE, MSASI, TWTA- Electric shocks > No exposure of the HV electrode

to outside of the spacecraft etc.- discharge accidents > ‘Double switch, Triple CMD’ etc.

*Radioactive materials : as calibrators (eg. MPPE)

*Access to the spacecraft at high positions : All instruments at ISAS / ESTEC / Kourou launch site

MMO-SWG #3 [Mar 22 2006] Extendible Antenna/Mast

Probe Antennae（WPT、MEFISTO)

Extendible MastsMedium Gain Antenna

High Gain Antenna

MMO-SWG #3 [Mar 22 2006]

Reaction Control System: Tank

tank

MMO-SWG #3 [Mar 22 2006]MMO-MPO Separation System

ソフトリリース機構マルマンランプ

MMO-SWG #3 [Mar 22 2006]

Design Criteria: Update

*Environment-Proof Design Criteria [MMO-C-EPDC] Mar. 2006

Mercury Environmental Specifications: Planetary Jan. 2006

Mercury Environmental Specifications: Environment Jan. 2006

*Electric Electronic Electromechanical Parts Criteria (MMO-EEEPC)

[Ver.1.41] Jan. 2006

*Electromagnetic Compatibility Design Criteria (MMO-C-EMCDC)

[Ver.1.11] Oct. 2005

Baseline is fixed by the discussion in MMO-EMC meeting in Oct 2005.

MMO-SWG #3 [Mar 22 2006] MMO Component Environment-Proof Design Criteria (MMO-C-EPDC)

Version 0.3 [draft] Feb. 2006

Figure 5.4.1-1: Dose in Silicon as a function of spherical aluminium shielding for the three mission phases. (from Figure 6 of Sec. 4.7 in Mercury Environmental Specification (Part II))

Radiation Environment: Changed associated with new mission senario

Cruise Mercury Total Cruise Mercury Total

**** Updated in 2006 Feb ****

MMO-SWG #3 [Mar 22 2006]

MMO Component Environment-Proof Design Criteria (MMO-C-EPDC)

Version 0.3 [draft] Mar. 2006 Mechanical Environment: Tentative Proposal

~ Fixed after the selection of the ESA Prime contractor ~

6.1.5.1 Random Vibration Test Levels**** Updated in 2006 Jan ****

MMO-SWG #3 [Mar 22 2006]

Related INFO: FPGA

Electric Electronic Electromechanical Parts Criteria (MMO-EEEPC)

Informal Information from ESA FPGA WG recommendation“5. Dynamic post-programming burn-in activities at component level shall be required for FPGA (they should be equivalent to MIL-STD-883 TM1015). The current ECSS-Q-60 standard should be updated accordingly.

Informal Information from ESA EEE divisionA strong recommendation on the Lisa-Pathfinder M-PDR to abandon the use of the subject Actel device in favour of the Actel SX device, where we at least have today a better understanding.

Baseline is fixed by the discussion between JAXA & ESA EEE members.