Thermal-Vac Test Today

The integration deadline was 5 pm Tuesday.  Payloads had to pass several checkpoints before being fully integrated onto the High Altitude Student Platform (HASP) including:

  • Current draw
  • Weight limits
  • Verification of commands sent
  • Verification of data down link
  • Verification of a proper data record

Once teams were cleared, they were allowed to integrate onto HASP.  Ten of the 12 teams passed the check out and our currently in the thermal-vac chamber.  The thermal-vac chamber allows for a full systems test under simulated stratospheric conditions.

This is our plan

  • Pumping down the chamber to a few millibars
  • Back fill with dry N2 to rid the chamber of humidity
    • ~800 mbar
    • Begin cooling down to -50°C (or -58°F)
    • Pump down to a few a mbar again
    • Sit for an hour
    • Check the payload functions
    • Comeback up to 1 bar using dry N2
    • Heat to 50°C (or 122°F)
    • Pump back down to a few mbar
    • Check the payload functions
    • Sit for hour
    • Back to 1 bar

The total process should take about 5-6 hours.  We should be done around 4 pm today.  Data is being downlinked and we can monitor in near real time.  In addition to individual payload data, we also monitor the HASP voltages, temperatures, and the ambient pressure.

http://laspace.lsu.edu/hasp/index.php

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