MM09 - 2018-08-01
Tracker Type: APRS
Powered by 2 AAA batteries
msBetweenTransmits = 3000 (3s, 0m, 0h)
lhAltFtThreshold = 10000
hAlt.wakeAndEvaluateMs = 900000 (900s, 15m, 0h)
lAlt.wakeAndEvaluateMs = 30000 (30s, 0m, 0h)
lAlt.stickyMs = 10800000 (10800s, 180m, 3h)
dz.wakeAndEvaluateMs = 7200000 (7200s, 120m, 2h)
Balloon and Payload
- One 36" Qualatex balloon
- 28.8 gram payload
- 1.87 grams free lift
- Top Altitude - 21,577 ft
- Duration - 11 hours, 5 minutes
- Distance - 324 miles following path
- Cause of death - Apparent leak
General Thoughts / Observations
The launch for MM09 was pretty turbulent. The wind was gusting and when the balloon was released you could see the tracker getting bounced around pretty good. After a few minutes the signals started and the balloon steadily rose to above 20,000 feet then settled into a very good float.
It appears that the balloon was floating nicely and then rose in elevation, that is when the descent started.
Thoughts for next time
Determine if there is a float / payload combination that will result in less internal pressure making the balloon safer during elevation fluctuations.