MISSION ASSURANCE
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Cosmic RAy Telescope for the Effects of Radiation
MISSION ASSURANCE
BRIAN KLATT
MISSION ASSURANCE MANAGER
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04/19/23 Performance Assurance 2
Cosmic RAy Telescope for the Effects of Radiation
GENERAL
• PERFORMANANCE ASSURANCE IMPLEMENTATION PLAN– LRO MAR– Model PAIP– CRaTER PAIP is 32-01204, Rev. F - Approved by GSFC
– PAIP applies equally to BU, MIT, and Aerospace Corp.
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04/19/23 Performance Assurance 3
Cosmic RAy Telescope for the Effects of Radiation
QUALITY ASSURANCE
• QUALITY MANAGEMENT SYSTEM
REQUIREMENTS FLOW-DOWN IMPLEMENTED THROUGH: SUBCONTRACT (CDRLs) PAIP PURCHASE ORDERS
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04/19/23 Performance Assurance 4
Cosmic RAy Telescope for the Effects of Radiation
SYSTEM SAFETY
• NO CHANGES
HAZARD ANALYSIS REPORTS UPDATED AND SUBMITTED - see 32-04015
Hazard Verification and tracking is 32-04014
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04/19/23 Performance Assurance 5
Cosmic RAy Telescope for the Effects of Radiation
RELIABILITY
• Failure Modes and Effects Analysis Prepared (see 32-04009)
• Part Stress Analysis Prepared (see 32-04010)• Derating per EEE-INST-002
• Reliability Assessment (see 32-04003)
Probability of Mission Success Ps = 96.5 %
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04/19/23 Performance Assurance 6
Cosmic RAy Telescope for the Effects of Radiation
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04/19/23 Performance Assurance 7
Cosmic RAy Telescope for the Effects of Radiation
SOFTWARE ASSURANCE
• NO CHANGES - -NO SOFTWARE
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04/19/23 Performance Assurance 8
Cosmic RAy Telescope for the Effects of Radiation
DESIGN REVIEWS
• Formal Reviews
Preliminary Design Review (IPDR) - held at MIT on 9/28/05 5 RFAS: 4 closed, 1 in-work at MIT & GSFC
Critical Design Review (ICDR) - held at MIT on 6/27/06
• Peer Reviews
Mechanical peer review held at MIT on 5/5/06 17 Comments in process at MIT
Electrical peer review held at GSFC on 5/22/06 15 Comments with responses to initiators
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04/19/23 Performance Assurance 9
Cosmic RAy Telescope for the Effects of Radiation
DESIGN VERIFICATION
• Performance and Environmental Verification Plan - see 32-01206
• Performance Verification - Comprehensive Performance Testing (CPT) is performed during extremes and at completion of Environmental Verification
• Environmental Test Matrix - see 32-01206.01
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04/19/23 Performance Assurance 10
Cosmic RAy Telescope for the Effects of Radiation
WORKMANSHIP and ELECTRONIC PACKAGING
• WORKMANSHIP - Recertification scheduled for late August• Staking and Conformal Coating • Soldered Electrical Connections• Crimping, Cables, Harnesses, and Wiring• Electrostatic Discharge (ESD) Avoidance
• PRINTED CIRCUIT BOARDS
– Coupons submitted for Engineering PCBs. Coupons passed but comments have prompted redesign for flight hardware.
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04/19/23 Performance Assurance 11
Cosmic RAy Telescope for the Effects of Radiation
MATERIALS and PROCESSES
• MaterialsChanged from AL 7075-T651 to Al 7075-T73
• Fasteners were bought to NASA Directive 541-PG-8072.1.2
• ProcessesConversion Coating is Alodine only
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04/19/23 Performance Assurance 12
Cosmic RAy Telescope for the Effects of Radiation
EEE PARTS
• PART SELECTION, SCREENING, QUALIFCATION and DERATING is per EEE-INST-002
• ALERTS
– Review ALERTS and NASA Advisories monthly - report to GSFC
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04/19/23 Performance Assurance 13
Cosmic RAy Telescope for the Effects of Radiation
CONTAMINATION CONTROL
• Contamination Control Plan is CRaTER document number 32-01203
• CRaTER Contamination Sensitivity - quite insensitive– Detector is not hermetically sealed and has .001 aluminum bond wires
(purge)
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04/19/23 Performance Assurance 14
Cosmic RAy Telescope for the Effects of Radiation