DM08 - 2019-06-01

Tracker Details

Tracker Type: WSPR

Model: PicoTrackerWSPR1 Rev5

Powered by 2 AAA batteries


Configuration:

15:54:57.771382, Parameters: (set <param> <val>)
15:54:57.809445, trackerId[4]                : DM08
15:54:57.842271, wsprCallsignId[2]           : Q2
15:54:57.872464, solarMode                   : 0
15:54:57.907073, minMilliVoltGpsLocationLock : 0
15:54:57.945116, minMilliVoltGpsTimeLock     : 0
15:54:57.977154, minMilliVoltTransmit        : 0
15:54:58.024922, gpsLockTimeoutMs            : 150000 2:30
15:54:58.062125, lhAltFtThreshold            : 10000
15:54:58.115168, hAlt.wakeAndEvaluateMs      : 600000 10:00
15:54:58.163011, lAlt.wakeAndEvaluateMs      : 45000 45
15:54:58.216107, lAlt.stickyMs               : 86400000 24:00:00
15:54:58.253293, crystalCorrectionFactor     : 510
15:54:58.285208, systemClockOffsetMs         : 9

Launch Parameters

Balloon and Payload

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

Heat sealed neck.


Experiments:

  • random WSPR channel selection
  • reduced weight, keeping free lift the same (3g), what happens to altitude
  • box launcher


Weight saving approaches:

  • Thin board (0.6)
  • Cut off headers
  • Thin antenna (magnet wire)

Predictions

Actuals

Launched from parking lot next to Barnes and Noble

Ripped off bottom antenna

Top antenna was tangled with ribbon

Hit some buildings on the way up

General Thoughts / Observations

Again, stop launching in stupid ways.

Develop a better approach for launching.