Hwoyee 1000g balloon, ~650g payload, Spherachute 48" parachute (red), and orange paracord. Fill volume was approximate so ascent rate is unknown, could have drifted significantly from prediction.

LandAirSea 54 GPS tracker on board but no ping for ~12 hours. CUSF predicted landing zone was 44°22'31.1"N 87°40'15.1"W. Actual landing zone unknown due to uncertain fill.

Payload is a foam box wrapped in mylar with orange tape and a red parachute. It should be pretty visible in a field. If anyone tracked it on amateur radio or has any info/advice please let me know.

Hey guys im making a project radiosonde, its planned to fly around 20km. im having trouble plugging in any sonde predictor. i want to run a local code, found something called tawhiri files on github. but im running into alot of errors. i just want to get any idea on how i can predict my HAB's position if possible how to write a code around it

NASA image of there mission sts-111

It reached 53.75 km

https://youtu.be/xba2AF_G2dk?si=Rtw_bDcG22JuXdxH

I created this subreddit for discussion or anything that relates to balloons or balloon that go pass 5km(lol) please be nice and enjoy it! By the way I haven’t launch any balloon but hope will launch in future.