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XRT Team Meeting

XRT Team Meeting. Location: ISAC/ASDC September 17-18, 2003. XRT Activation. Very limited command time during first week 3 orbits on Day 3 Minimal availability for rest of first week Minimal turnon and checkout during this period Checkout period before doors open

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XRT Team Meeting

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  1. XRT Team Meeting Location: ISAC/ASDC September 17-18, 2003 XRT Team Meeting – ASDC – September17-18, 2003 (Page 1)

  2. XRT Activation • Very limited command time during first week • 3 orbits on Day 3 • Minimal availability for rest of first week • Minimal turnon and checkout during this period • Checkout period before doors open • Slow, methodical checkout of instrument • Leave plenty of time for thorough verification of telemetry • Leave time for dealing with any anomalies • Doors open ~ L+21, things get much busier! • Checkout ends about 4 weeks after launch, followed by calibration XRT Team Meeting – ASDC – September17-18, 2003 (Page 2)

  3. XRT Activation Sequence(XRT-PSU-056) • Day L+3: power on, initial tests, vent camera • Orbit N • Turn on power, monitor HK and self-test • Switch HK to TDRSS, monitor for one orbit • Orbit N+1 • XRT aliveness test: verify 1553, command and telemetry interfaces • Verify RAD6000 memory status • Orbit N+2 • Turn on mirror baffle heaters • Warm CCD to +30C (for 120 minutes) • Orbit N+3 • Open FPCA vent for 10 minutes • Open Sun Shutter (should already be open) • Take one raw CCD frame (verify detector) XRT Team Meeting – ASDC – September17-18, 2003 (Page 3)

  4. XRT Activation Sequence(XRT-PSU-056) • Day L+4,5,…,21: vent camera • Orbit N • Warm CCD to +30C (for 120 minutes) • Orbit N+1 • Open FPCA vent for 10 minutes • Orbit N+2 • Take one raw CCD frame (verify detector) • Day 9: start checkout, verify TAM • Orbit N • Turn on TAM, test with both LEDs (full-frame images) • Day 10: start TAM data, turn on tube heaters • Orbit N • Begin taking TAM images every 5 minutes • Orbit N+1 • Verify TAM window images • Orbit N+2 • Turn on tube heaters • Orbit N+3 • Monitor tube heater operation and TAM centroid behavior XRT Team Meeting – ASDC – September17-18, 2003 (Page 4)

  5. XRT Activation Sequence(XRT-PSU-056) • Day 11: check noise on signal chains • Orbit N • Take 3 raw frames, high gain, A side, serial clocks backwards • Verify amp/signal chain, measure noise • Orbit N+1 • Take 3 raw frames, low gain, B side, serial clocks backwards • Verify amp/signal chain, measure noise • Day 12: check camera functionality • Orbit N • Take 5 raw frames, high gain, A side, all clocks forwards • Verify amp/signal chain, measure noise • Orbit N+1 • Take 5 raw frames, low gain, B side, all clocks forwards • Verify amp/signal chain, measure noise XRT Team Meeting – ASDC – September17-18, 2003 (Page 5)

  6. XRT Activation Sequence(XRT-PSU-056) • Day 13: verify filter integrity • Orbit N • Turn on FPCA LED, take raw frame, verify filter integrity • Q: do we want A and B sides? • Day 14: Cool CCD, check camera noise, energy resolution • Orbit N • Cool CCD to –100 C • Orbit N+1 • Take 5 raw frames, high gain, A side, all clocks forwards • Verify amp/signal chain, measure noise • Orbit N+2 • Take 5 raw frames, low gain, B side, all clocks forwards • Verify amp/signal chain, measure noise XRT Team Meeting – ASDC – September17-18, 2003 (Page 6)

  7. XRT Activation Sequence(XRT-PSU-056) • Day 15: check all readout modes • Orbit N • Collect 5 PuPD mode frames • Measure noise, gain, FWHM • Orbit N+2 • Collect 100 LrPD frames • Measure gain, FWHM • Orbit N+3 • Collect bias row • Collect 500 WT frames • Measure gain, FWHM • Orbit N+4 • Collect bias map • Collect 200 PC frames • Measure gain, FWHM XRT Team Meeting – ASDC – September17-18, 2003 (Page 7)

  8. XRT Activation Sequence(XRT-PSU-056) • Day 16: SAA tests • Collect one raw frame per minute during SAA passages to map out SAA • Day 17: Open XRT telescope door • Orbit N: open telescope door • Orbits N+2, N+3: collect some CCD data (raw frames) • Orbit ?: collect PuPD and IM data in SAA • L+18: Collect calibration data in LrPD mode • Run camera in LrPD mode for one day • L+19: Collect calibration data in WT mode • Run camera in WT mode for one day • L+20: Collect calibration data in PC mode • Run camera in PC mode for one day XRT Team Meeting – ASDC – September17-18, 2003 (Page 8)

  9. XRT Activation Sequence(XRT-PSU-056) • Day 21: Open FPCA door • Orbit N • Turn off TEC • Orbit N+1 • Warm CCD to +30 C • Begin venting camera (throughout orbit) • Orbit N+2 • Continue venting camera • Open FPCA door • Orbit N+4 • Turn off TEC, let CCD cool down to cold finger temp • Orbit N+5 • Check filter integrity XRT Team Meeting – ASDC – September17-18, 2003 (Page 9)

  10. XRT Activation Sequence(XRT-PSU-056) • Day 22: Cold Tests (or first light? What order do we want to do?) • Orbit N • Cool CCD to –100 C • Orbit N+1 • Collect 5 (TBR) raw high gain frames on Amp A [focus check] • Is 5 frames sufficient? • What is appropriate target? • Point source? {for focus check} • How bright? • Orbit N+2 • Collect 5 raw low gain frames on Amp B • Same questions • Orbit N+3 • Collect 5 frames in PuPD mode • Needs point source. Can we do anything with 5 frames? • Orbit N+4 • Collect 100 frames in LrPD mode • Is this enough frames (only about 820 seconds exposure)? • Point source or Crab? XRT Team Meeting – ASDC – September17-18, 2003 (Page 10)

  11. XRT Activation Sequence(XRT-PSU-056) • Day 22 (cont.) • Orbit N+5 • Collect bias row • Collect 500 WT frames • Measure FWHM and gain (how??) • Orbit N+6 • Collect bias map • Collect 200 PC frames • Measure FWHM and gain • Day 23: Centroiding tests • Orbit N • Collect 100 short image frames, verify centroiding • Orbit N+1 • Collect 100 long image frames, verify centroiding XRT Team Meeting – ASDC – September17-18, 2003 (Page 11)

  12. XRT Activation Sequence(XRT-PSU-056) • Day 24: Test Auto State, collect bias information • Orbit N • Slew to bright targets (e.g. Sco X-1, Crab, etc.) as ATs • Verify correct XRT mode switching • Verify TDRSS messages • Orbit N+1 …. • Switch to Manual state • Point at blank sky • Collect bias information for IM mode for one day (one frame every 15 minutes) • May want to collect PD every minute for one orbit, let other instruments select targets for rest of day. • Day 25: WT mode bias tests • All orbits • Manual state • Point at blank sky • Collect bias rows • Collect 1000 WT frames • Repeat for one day XRT Team Meeting – ASDC – September17-18, 2003 (Page 12)

  13. XRT Activation Sequence(XRT-PSU-056) • Day 26: Photodiode mode bias measurements • All orbits • Manual state • Point at blank sky • Collect PuPD frame • Collect 100 LrPD frames • Repeat for one day • NOTE: this may saturate telemetry capability for this day • Alternatively, use same strategy suggested above for IM mode. • Day 27: PC mode bias measurements • All orbits • Point at blank sky • Collect bias map • Collect 400 PC frames • Repeat for one day • Note: this could be done in either manual or auto state • Alternatively, use same strategy suggested above for IM mode. XRT Team Meeting – ASDC – September17-18, 2003 (Page 13)

  14. XRT Activation Sequence(XRT-PSU-056) • Days 28-30 • Switch to Auto state • Monitor instrument performance during slew tests to interesting targets • Official First Light observations??? • Press conference observations?? XRT Team Meeting – ASDC – September17-18, 2003 (Page 14)

  15. Launch / Early Orbit support • Burden should be light for first three weeks (but still 24 hours) • Joe or I will be on call 24 hours – we need European support for 12:00 – 8:00 EST • Use this as training period for duty scientists • Need full support beginning around day 21 • Operators (PSU) • Hill • Burrows • Gendreau? • Duty Scientists • (training) • Analysts (remote) • Mori (PSU) • Morris (PSU) • Mukerjee (UL) • Abbey (UL) • Beardmore (UL) • Campana (OAB) • Moretti (OAB) • New hire (OAB) • Instrument Duty Scientists • (one week at PSU) • Hill • Mukerjee (UL) • Beardmore (UL) • Moretti (OAB) • New hire (OAB) XRT Team Meeting – ASDC – September17-18, 2003 (Page 15)

  16. XRT Status • Hardware – no changes • Software – Build 8.5 installed in August • Fixes problems identified in Build 8.4: • Fix for TDRSS messages being sent coming out of SAA for all targets • Improved CPU usage in Windowed Timing Mode • Bias information for LrPD Mode • Fix for PC Mode when using a Bad Pixel Map and Bias Map • Number of pixels >LLD and <ULD corrected in Image Mode • Bias Map amp ID correction in data header • “SCUI not read event” telemetered even if data is not dropped • Residual issues: • Powering TAM on twice hangs TAM software • Workaround: kill TAM task and restart (also procs) • PuPD frame is still generated if we slew to target in SAA • Data rate is still about a factor of 2 too high (due to bias maps) • New Mode Sequence Table loaded • Removes PuPD frames from slews to reduce telemetry • Fix for TDRSS messages coming out of SAA XRT Team Meeting – ASDC – September17-18, 2003 (Page 16)

  17. Build 8.5 FSW upload Flight SW uploaded as part of SCIF#4a: • Flight procedures and flight STOL procs written for: • Full build upload to BC1 • Flight Software dump • Mode Sequence Table upload • Waveform upload • Test run from GSFC MOC • Included 3 hour wait between block #4 and #5 • FSW image dump to SSR • Rebooted from BC1 (in flight BC0 is locked) • MST upload • Waveform uploads • Instrument Aliveness performed through MOC XRT Team Meeting – ASDC – September17-18, 2003 (Page 17)

  18. Build 8.5 FSW testing/verification Tests performed post load: • Set boot index back to BC0 • CPT • DiTL • Plugs Out test • Ran S/C Emergency Power Down procedure Test Issues: • Powering the TAM twice ‘hangs’ the TAM SW • A PuPD frame is sent out when we come out of SAA, if we slew to a target while we are in the SAA XRT Team Meeting – ASDC – September17-18, 2003 (Page 18)

  19. DitL test Expand XRT Team Meeting – ASDC – September17-18, 2003 (Page 19)

  20. Settled SLEW SLEW SLEW SLEW In 10’ Bias Bias Bias DitL test SAA 8=Safe Hold 4=SAA 2=in 10’ 1=Settled 9=Bias 8=Raw 7=PC 6=WT 5=LRPD 4=PUPD 3=Long IM 2=Short IM 1=Null Bias PUPD Null LRPD XRT Team Meeting – ASDC – September17-18, 2003 (Page 20)

  21. Proposed additional FSW tests We plan to utilize the time made available by BAT slips to: • Test WT mode with 200 pixel window • Lock EEPROM • Verify new waveforms • Verify MST reload from EEPROM w/o reboot • Verify Bad Pixel Map and Bad Pixel Row • Verify SCUI buffer at 80 Mb • SAA test with observatory running new SAA polygon and XRT calculating its own SAA • Bad DiTL • Launch and Early Orbit Sims • Figure out baseline voltages for A low gain and B high gain XRT Team Meeting – ASDC – September17-18, 2003 (Page 21)

  22. Trending • Trending: what data do we need to trend? • Analog HK - MOC • TAM centroids - MOC • Corner source centroids and FWHM – SDC • Format: • ASCII table: easy to import into Excel • FITS: not clear to me how to handle this easily, esp. if in binary table format. XRT Team Meeting – ASDC – September17-18, 2003 (Page 22)

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