Dave VE3KCL was the first person to use QRP Labs kits based on the Ultimate3S kit for high altitude "floater" balloon tracking. These flights use a special firmware version which carries additional telemetry over the WSPR network. The Flight S-4 page has a full explanation of this. 

Flight listing

Click the flight name in this table to go to the flight's page. 

Operator Launch
Duration Altitude Distance Comments
S-24 Dave VE3KCL Pending        
U3S-9 Jim N2NXZ 23-Apr-2017 12.5hours   370km  
U3S-8 Jim N2NXZ 14-Apr-2017   9,560m    Reported on 25-Apr-2017 over Arizona
S-23 Dave VE3KCL 02-Apr-2017 1 day  10,200m 1,259km  
S-22 Dave VE3KCL 17-Mar-2017 8 hours ~9,000m 804km  
U3S-7 Jim N2NXZ 20-Feb-2017 1.5 days 9,744m 2,700km  
S-21 Dave VE3KCL 20-Feb-2017 1.5 days 9,580m >3,003km  
STELLA4 Daniel DL6OW 31-Dec-2016 Unknown Unknown 120km Latex stratosphere balloon
STELLA3 Daniel DL6OW 16-Nov-2016 4.5 hours 9,020m 96km  
S-20 Dave VE3KCL 06-Nov-2016 12 hours 10,660m 781km  
STELLA2 Daniel DL6OW 29-Oct-2016 4 hours  6,080m 194km  
U3S-4 Jim N2NXZ 19-Oct-2016 7 days  Unknown    
S-19 Dave VE3KCL 10-Oct-2016 Unknown >10,000m Unknown Lost due to GPS fault
S-18 Dave VE3KCL 07-Oct-2016 27 days 11,080m 46,502km Second VE3KCL circumnavigation!
Brick Jim N2NXZ 22-Sep-2016 3 days 9,500m N/A Transatlantic flight by Jim N2NXZ
S-17 Dave VE3KCL 19-Sep-2016 6 days 11,560m 11,187km  
S-16 Dave VE3KCL 02-Aug-2016 1 day 10,340m 940km  
STELLA1 Daniel DL6OW 30-Jul-2016 7 hours 8,700m 181km First DL6OW flight!
S-15 Dave VE3KCL 19-Jul-2016 9 days ~9,500m 11,615km  
S-14 Dave VE3KCL 11-Jul-2016 2 days ~9,500m 3,634km  
S-13 Dave VE3KCL 04-Jul-2016 6 days ~10,000m 12,732km  
S-12 Dave VE3KCL 21-Jun-2016 9 days ~10,000m 15,114km  
S-11 Dave VE3KCL 14-Jun-2016 24 days >10,000m 38,092km First VE3KCL circumnavigation!
S-10 Dave VE3KCL 09-May-2016 10 days ~10,000m 9,372km  
S-9 Dave VE3KCL 10-Apr-2016 18 days ~10,000m 51,711km Epic flight! Almost back to the start line.
S-8 Dave VE3KCL 30-Mar-2016 10 hours 13,180m 783km Highest VE3KCL flight. Used homemade balloon
S-7 Dave VE3KCL  11-Mar-2016 1d 9hrs ~7,500m 4,975km  
S-6 Dave VE3KCL  24-Sep-2015 3 days ~8,000m 4,300km  
S-5 Dave VE3KCL  04-Sep-2015 5 hours 11,040m   Latex balloon (not mylar floater)
S-4 Dave VE3KCL  24-Jul-2015 6 days ~8,300m 10,288km First transatlantic VE3KCL flight
S-3 Dave VE3KCL 28-Jul-2015 5 days ~8,000m 4,335km 16mW received 23,500km away by ZL1RS
S-2 Dave VE3KCL 22-Jul-2015 2 hours 4,120m 91km  
S-1 Dave VE3KCL 03-Jun-2015 2.5 hours  4,333m 68km First U3S flight!