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
STELLA22 Daniel DL6OW Pending        
STELLA21 Daniel DL6OW Pending        
STELLA20 Daniel DL6OW Pending        
U3B-28 Dave VE3KCL          
STELLA19 Daniel DL6OW 08-Jun-2019        
U3S-33 Jim N2NXZ 27-May-2019        
U3B-27 Dave VE3KCL 15-MAy-2019        
U3S-32 Jim N2NXZ          
U3B-26 Dave VE3KCL Pending        
U3S-31 Jim N2NXZ 10-Apr-2019        
U3S-30 Jim N2NXZ 19-Mar-2019 4.5 hours    420km  
U3S-29 Jim N2NXZ 08-Mar-2019 6 hours  ~11,000m  257km Custom envelope, burst at altitude
U3B-25 Dave VE3KCL 28-Feb-2019        
STELLA15 Daniel DL6OW Pending        
U3S-26 Jim N2NXZ Pending        
U3B-24 Dave VE3KCL Pending        
U3B-23 Dave VE3KCL Pending        
U3B-22 Dave VE3KCL Pending        
U3S-25 Jim N2NXZ Pending        
U3B-21 Dave VE3KCL Pending        
STELLA13 Daniel DL6OW Pending        
U3B-20 Dave VE3KCL Pending        
U3S-24 Jim N2NXZ Pending        
U3B-19 Dave VE3KCL Pending        
U3B-18 Dave VE3KCL Pending        
U3B-17 Dave VE3KCL Pending        
U3B-16 Dave VE3KCL Pending        
U3B-15 Dave VE3KCL Pending        
U3S-23 Jim N2NXZ Pending        
U3S-22 Jim N2NXZ Pending        
U3B-14 Dave VE3KCL Pending        
U3S-21 Jim N2NXZ Pending        
BB05 Bob ZL1RS Pending        
BB04 Bob ZL1RS Pending        
U3B-13 Dave VE3KCL Pending        
BB03 Bob ZL1RS 07-Jan-2018 2 days  10,460m 1,826km  
STELLA10 Daniel DL6OW          
BB02 Bob ZL1RS 17-Dec-2017 9 days ~9,500m 24,320km  
BB01 Bob ZL1RS 08-Dec-2017        
U3S-20 Jim N2NXZ Pending        
STELLA9 Daniel DL6OW Pending        
U3B-12 Dave VE3KCL Pending        
STELLA8 Daniel DL6OW Pending        
STELLA7 Daniel DL6OW Pending        
U3B-11 Dave VE3KCL Pending        
STELLA6 Daniel DL6OW Pending        
U3B-10 Dave VE3KCL Pending        
U3B-9 Dave VE3KCL Pending        
U3S-19 Jim N2NXZ Pending        
U3B-8 Dave VE3KCL Pending        
U3B-7 Dave VE3KCL Pending        
U3B-6 Dave VE3KCL Pending        
U3S-18 Jim N2NXZ Pending        
U3S-17 Jim N2NXZ Pending        
U3S-16 Jim N2NXZ Pending        
U3S-15 Jim N2NXZ Pending        
U3B-5 Dave VE3KCL Pending        
U3B-4 Dave VE3KCL Pending        
U3B-3 Dave VE3KCL Pending        
U3S-14 Jim N2NXZ Pending        
U3S-13 Jim N2NXZ Pending        
U3B-2 Dave VE3KCL Pending        
U3B-1 Dave VE3KCL 16-Jun-2017 2 day >10,000m   First U3B test flight... GPS failed over 10km
S-26 Dave VE3KCL Pending        
U3S-12 Jim N2NXZ 08-Jun-2017 1 day >9,000m 955km  
S-25 Dave VE3KCL 02-Jun-2017        
U3S-10-2 Jim N2NXZ 28-May-2017 6 days 10,260m 3,253km  
U3S-11 Jim N2NXZ 23-May-2017 1 day  10,080m 2,429km  
S-24 Dave VE3KCL 10-May-2017 8 days ~10,000m  22,065km  
U3S-10 Jim N2NXZ 10-May-2017 ~2 minutes 0m <100m Crashed into nearby tree
U3S-9 Jim N2NXZ 23-Apr-2017 12.5hours   370km  
U3S-8 Jim N2NXZ 14-Apr-2017 11 days 9,560m   Reported on 25-Apr-2017 over Arizona, almost circumnavigation!
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!