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ICU-AVM Performance Review for HIFI Science at Groningen, April 2006

This presentation outlines the performance of the ICU-AVM and CFM components in relation to the HIFI science verification review held in Groningen in April 2006. Key findings include operational differences from flight hardware, limitations of the current ILT setup, and ongoing software development issues. Despite capabilities to support anticipated AOTs, testing delays due to unaddressed software bugs are noted. The presentation emphasizes the need for realistic simulators and improvements in the bug-fix turnaround time to facilitate thorough testing before delivery.

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ICU-AVM Performance Review for HIFI Science at Groningen, April 2006

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  1. ICU-AVM/CFM/.. performance Presentation for HIFI Science Verification Review Groningen, April 20, 2006

  2. ICU - hardware • No Flight Model tested so far at ILT level • Operational significant differences with flight hardware: • Only one ICU in box (no redundant ICU) • ICU not (fully) capable of providing FCU power • In some cases smaller FIFOs for spectrometer interfaces • Different memory sizes • Boot firmware updated to version compatible with baseline for flight HIFI SVR Groningen 20-4-2006 - ICU-AVM/CFM/.. performance

  3. ICU – software • Version 3 denotes flight software • Subversion 3.5 now being used for ILT • Major functions still not developed: • Most chopping spectroscopy modes • OB Software problems delayed DM testing by several weeks • Many OBS functions cannot be tested fully before delivery: • Developers lack realistic simulators • More delays expected when OBS bugs block testing • OBS consolidation effort has improved bug fix turnaround significantly with respect to DM HIFI SVR Groningen 20-4-2006 - ICU-AVM/CFM/.. performance

  4. ICU – ILT results so far • ICU & OBS capable of supporting currently foreseen AOTs – but not yet demonstrated • Tuning of total receiver conceptually OK: • Tuning of individual subsystems tested with minor bugs • No end-to-end tune yet – cannot be done realistically with simulators • (Hardware) data rate limitations confine the AOT design, e.g.: • Maximum one (pair of) WBS readout per second • Maximum one full spectrometer set readout per four seconds HIFI SVR Groningen 20-4-2006 - ICU-AVM/CFM/.. performance

  5. ICU – limitations of ILT test setup • Timing of command issuing by CDMS cannot be simulated exactly • OBS management procedures not yet fixed - no tests ?? HIFI SVR Groningen 20-4-2006 - ICU-AVM/CFM/.. performance

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