DM12 - 2019-10-04

Tracker Details

Tracker Type: WSPR

Model: PicoTrackerWSPR1 Rev5 0.6mm thickness

Powered by 2 AAA batteries


Parameters: (set <param> <val>)
trackerId[4]            : DM12
wsprCallsignId[2]       : Q2
gpsLockTimeoutMs        : 150000 2:30
lhAltFtThreshold        : 15000
hAlt.wakeAndEvaluateMs  : 1800000 30:00
lAlt.wakeAndEvaluateMs  : 300000 5:00
lAlt.stickyMs           : 10800000 3:00:00
crystalCorrectionFactor : 400
systemClockOffsetMs     : -8

Decided to have low-altitude be 20,000ft.

New battery should be heavier, but even still should

Also sticky 3 hours, and 30 min intervals during flight.

Aiming for long duration.

Launch Parameters

Balloon and Payload

  • 36" Qualatex, unstretched
  • 23.2 gram payload
  • 2.1 grams free lift
  • Half-wave antenna.

Heat sealed neck.



Some pretty high-speed travel.

~1,500 miles traveled.

Cause of death unclear.

General Thoughts / Observations

Super windy.

Tried to launch outside in the parking lot two times, each time with cable wrapup either in itself or on the fence.

Definitely unwinding the antennas separately is a must.

Useful to tape down one end so you can anchor it and walk away.

Eventually launched from the park in high wind.

Write up better launch technique for non-box-launch, including taping down end and holding top in place with tape dispenser while attaching balloon.