Day 24 update: 05-Jun-2020
Day 20 update: 01-Jun-2020
Day 18 update: 30-May-2020
Day 16 update: 28-May-2020
Day 15 update: 27-May-2020
Day 14 update: 26-May-2020
Day 9 update: 21-May-2020
Day 7 update: 19-May-2020
Day 6 update: 18-May-2020
Day 5 update: 17-May-2020
Day 4 update: 16-May-2020
Day 3 update: 15-May-2020
Day 2 update: 14-May-2020
Day 1 update: 13-May-2020
This is the 8'th test flight of the new U4B tracker. For details see below.
U4B-8 was launched on 13-May-2020 at 1400Z.
U4B-8 uses callsign VE3KCL and the old-style telemetry channel 04. The WSPR report is at minutes :00 :10 :20 minutes past the hour, followed at :02 :04 etc by the QRP Labs telemetry packet. There are additional WSPR-only (no telemetry) transmissions on six additional bands; and in the 1 minute prior to the main WSPR transmission i.e. :09, :19, :29 etc there is a balloon glyph on 20m.
U4B-8 also transmits one WSPR transmission per hour on 6m, 10m, 15m, 30m, 40m and 80m bands! Though of course the antenna is not resonant on these.
U4B-8 is back! Far enough back South for a GPS reboot in darkness, and proper operation... though the wind projection indicates it will go back far North again :-(
U4B-8 is still so far up North in the midnight sun that the GPS is not getting lock, for some reason, and there is no opportunity for it to reset by a power cycle, due to the 24-hours of sunshine. KL7L was able to copy WSPR by intentionally offsetting his computer clock but the WSPR does not report any GPS information (including altitude and position).
U4B-8 flew so far North that it has experienced midnight sun and this appears to have caused a lock-up situation with the GPS. It has been transmitting every 20 minutes instead of 10 minutes, off schedule, and not providing any GPS location information.
Quite a few balloon sightings today! Reading left to right:
Andy G0FTD in UK, the U4B-8 balloon glyph clearly visible at the right, and U4B-6 more weakly towards the middle.
Bob K4RCG has U4B-8 top left, and a very strong signal from U4B-6 burning up his radio, at top right
Vernon VE1VDM again has a nice picture, showing both U4B-6 and U4B-8 clearly visible
Bill W4HBK has very strong signals from U4B-8, and U4B-6 pretty good too!
Here are the number WSPR reports in the first 2 days of U4B-8's flight, on OTHER bands than the intended 20m. Recall, U4B-8 transmits one WSPR slot per hour on each of these six bands for which the antenna is far from ideal, just for fun:
6m 8 spots
10m 29 spots
15m 45 spots
30m 63 spots
40m 18 spots
80m 1 spot.
A successful launch and climb to altitude!
Here is a zoom of how the Balloon glyph looks, with the slow-Hell "8" next to it on the left:
Reports were also received of the balloon glyph; below shows Vernon VE1VDM's hat-trick, he copied U4B-4, U4B-6 and U4B-8 glyphs all at the same time! The image from W4HBK shows U4B-6 and U4B-8.
This is the 8th test flight of the new U4B tracker. It is a test of a new TCXO part. U4B-8 was assembled by Dave VE3KCL. This YouTube video explains the features of the U4B tracker.
U4B-8 includes a balloon glyph just prior to the WSPR transmission at :00 :10 :20 etc minutes past the hour. This is the same as on the -7 flight, There is a slow-Hellshreiber "8" to the left of the balloon!
The BASIC program listing:
LET C = 42 2 IF BT < 2900 SLEEP 10 1 GOTO 2 ENDIF 4 GOSUB 17 5 WSPR 2 3570040 10 "VE3KCL" 6 GOSUB 17 7 WSPR 2 7040040 10 "VE3KCL" 8 GOSUB 17 9 WSPR 2 10140140 10 "VE3KCL" 10 GOSUB 17 11 WSPR 2 21096040 10 "VE3KCL" 12 GOSUB 17 13 WSPR 2 28126040 10 "VE3KCL" 14 GOSUB 17 15 WSPR 2 50294440 10 "VE3KCL" 16 GOTO 4 17 LET FR = 24999997 OUT 9 0 GPS 304 "$PSIMNAV,W,3*3A" OUT 9 CL 18 IF BT > 3800 19 LET I = 1 20 GOTO 25 21 ENDIF 22 LET I = 0 25 SLEEP 10 9 CW 0 14096990 12 0 " VE3KCL" HELL 0 14096940 12 8 "8" CW O 14096940 5 0 "*01IFLCNAP8Q7R6R5S0S0S5R6R7Q8PANCLFI*" 28 TELE 29 RETURN ve3kcl channel 4 14097020 379 bytes compiled