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Backup Slides. 24 hours. Roadmap for Vibratory Regime. spectrogram is a “roadmap” that shows boundaries and structure in time and frequency. Qualify Quantify. BASS Ops . FREQUENCY. TIME. MAGNITUDE. Crew Wake. MSG facility equipment turns on/off. Crew Exercise. Ku-band

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Backup Slides

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  1. Backup Slides

  2. 24 hours Roadmap for Vibratory Regime spectrogram is a “roadmap” that shows boundaries and structure in time and frequency Qualify Quantify BASS Ops  FREQUENCY TIME MAGNITUDE Crew Wake MSG facility equipment turns on/off Crew Exercise Ku-band Antenna

  3. Progress Reboosts statistics for 24 reboost events

  4. ATV3 Reboost GMT 31-Mar-2012 remarkably similar BEFORE 0 < f < 200 Hz DURING x-axis 1.4 mgRMS x-axis 1.3 mgRMS Acceleration TIME y-axis 1.0 mgRMS y-axis 1.0 mgRMS ± 10 mg z-axis 1.2 mgRMS z-axis 1.1 mgRMS

  5. ATV3 Reboost GMT 31-Mar-2012 BEFORE 0 < f < 6 Hz DURING x-axis 0.3 mg step duration ~7min y-axis structural mode excitation ± 1 mg

  6. Ku-Band Antenna, Qualify • Frequency range ~ 5 to 17 Hz • Orbital variations to track “current” satellite • Sporadic events to acquire “next” satellite Ku-band Antenna Frequency Range

  7. Ku-Band Antenna, Quantify10-Minute Interval RMS, 5 < f < 17 Hz 10-min. interval RMS TIME (total of 6 days) ugRMS daily cycle SAMS 121f08 in COL GMT (2012)

  8. When Should I Run My Experiment? TIME (4 hr chunks) RMS statistics min(median) …well, if you are in the US LAB, near the MSG (where SAMS sensor 121f02 is located), then your best 4-hour span is GMT hours 02 to 06

  9. When Should I Run My Experiment? min(median) …but, if you are in the Columbus module, near ER3(where SAMS sensor 121f08 is located), then your best 4-hour span is GMT hours 01 to 05

  10. ARIS Attenuation During FIR Ops 20Hz X ARIS OFF Per-Axis Power Spectral Density ARIS ON Y Frequency (Hz) TUNING Z

  11. “Mode One” – First Mode of Main Truss • In general, for structural mode regime below 3 Hz: • is excited by crew activity and impulsive events • RMS levels are nominally: • ~ 30 ugRMS for USL • ~ 40 ugRMS for COL and JEM • Mode One: • is monitored daily for structural integrity & off-nominal impacts • in Sept. 2012, nominal RMS levels were: • < 2 ugRMS for USL • < 3 ugRMS for COL and JEM SLEEP WAKE DC - 1 Hz 0.1 Hz

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