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CHECKLIST.md

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This is the pre-flight checklist that should be followed for every line cutter launch. Detailed instructions for setting up the line cutters are elsewhere; read those first. Consider any time limits mentioned to be a lower bound---completing items earlier than the listed time is encouraged, on-time is acceptable, and after will result in a rushed (read: risky) process. Keep in mind that although the checklist only covers line cutter prep, it implicitly requires that the rest of your rocket is also prepared in a timely manner.

14 days before launch:

  • Ensure that you have all materials needed for setup (if you need to ship more stuff, it's important to know this early)

6 days before launch:

  • Sew outer cases and loops onto your parachute
  • Make a local copy of the dpf-line-cutter repository

3 days before launch:

  • Assemble the cases (including nichrome)
  • Decide on reefing amounts and reef the parachute
  • Ejection test with the assembled cases

1 day before launch:

  • Charge all batteries (and spares)
  • Put your PCBs in the cases
  • Erase the flash memory on the PCBs
  • Decide on and upload flight variables
  • Upload flight code

On launch day:

  • Plug in the batteries once you have a reasonable expectation that the PCBs won't run out of memory (< 3 hours before launch)
  • Immediately use !vars and !data to check for expected values from both line cutters
  • Put (preferably black) etape over LEDs
  • Burrito your parachute and put in your rocket, but don't screw things together yet
  • Use !data to check that the photoresistors are reading below ~200 on both line cutters
  • Finish assembling rocket

On the rail:

  • Use !data for final confirmation that photoresistors are reading below ~200 and state is WAITING on both line cutters
  • Arm both line cutters with !arm
  • Use !data to confirm that both line cutters are in the ARMED state
  • Optional: if the rocket needs to be taken off the rail for any reason, you should !disarm both line cutters and confirm using !data
  • Launch!

After landing:

  • Take photos of both line cutters when you recover your rocket
  • Visually confirm that both lines have disreefed
  • Once you're back at the lab, follow the flash offload instructions to get flight data
  • Send data to the line cutter team
  • Report any potential issues with or damage to the individual line cutters
  • Disassemble and return components