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Critical items, Key issues, Risks and Save Operation Aspects

Critical items, Key issues, Risks and Save Operation Aspects. R.Schieder/ R.Bieber. Critical Items PAD sheets are sent off. Laser diode: QA program almost finished CCD: Radiation test finished (3 krad okay) QA program at Lewicki successfully finished ASICS:

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Critical items, Key issues, Risks and Save Operation Aspects

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  1. Critical items, Key issues, Risks and Save Operation Aspects R.Schieder/ R.Bieber WBS CDR 2-3rd april 2003

  2. Critical ItemsPAD sheets are sent off • Laser diode: • QA program almost finished • CCD: • Radiation test finished (3 krad okay) • QA program at Lewicki successfully finished • ASICS: • Radiation test and life-time test successful • ATMEL tests: okay • MITEQ: • Prototype delivered and successfully tested • Amplifier not yet selected - delivery 2-3 months • MPAE: • Output filter for secondary voltages WBS CDR 2-3rd april 2003

  3. Key issues (1) ! WBS REQUIREMENTS ! • Thermal interface of WBO • 1K/hour (acc. ESA analysis: okay) • 2K over the baseplate (analysis by ESA shows a 6K difference) • wrapped in MLI • Temperature range: +5 - +150C WBS CDR 2-3rd april 2003

  4. Key issues (2) • Out of band signals ? • IF input signal without any filtering • Mechanical interface of WBE • (no full baseplate contact - 1mm spacing to SVM) • design already established with MITEQ • no design change possible anymore (mail from and to HA on 25.03.03) • Thermal analysis verifies current design WBS CDR 2-3rd april 2003

  5. Key issues (3) • Shock vibration: • Critical for WBO-modules • Levels: TBD • ESD: • Increased level in IID-A ? • Radiated Emission: • Transponder band spec. (0dBmV/m) not compliant • CPPA: (no information!) • Delivery of Filter, power supplies, ADC ??? WBS CDR 2-3rd april 2003

  6. schedule manpower Either QM delivery delays or model philosophy has to change Risks success oriented at lowest limit Delivery of parts / subcontractors (CPPA/MITEQ) delays at least QM program WBS CDR 2-3rd april 2003

  7. Undefined IF-input signal Longer non-operating periods (>1 week) Temperature of WBO > 300C Save Operation Aspects ZERO: ON Laser: OFF ZERO: ON Laser: OFF ZERO: ON WBS CDR 2-3rd april 2003

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