Print
Hits: 7962

U3S

Live tracking
Day 5 update: 05-Jun-2020
Day 1 update: 01-Jun-2020
Launch photos
Transmitter

This is the 10'th test flight of the new U4B tracker. For details see below.

The WSPR callsign on 20m is VA3UAL and telemetry uses the old-style channel 43. The WSPR transmission is on minute :04 past the hour and every 10 minutes; it is followed by the telemetry transmission. The balloon glyph precedes the WSPR transmission in minute :03 :13 :23 etc. 

U4B-10 was launched on 01-Jun-2020. 

Live tracking


Day 5 update: 05-Jun-2020

data.png noaa.png


Day 1 update: 01-Jun-2020

Successful launch and ascended to around 11,600m!

The balloon glyph was copied by Bill W4HBK:

2020-06-01.png data.png noaa.png


Launch photos

IMG_20200601_092700431.jpg IMG_20200601_092705972.jpg IMG_20200601_092738389.jpg


Transmitter

This is the 10th test flight of the new U4B tracker. U4B-10 was assembled by Dave VE3KCL. This YouTube video explains the features of the U4B tracker. 

U4B-10 includes a balloon glyph just prior to the WSPR transmission. This is the same as on previous flights, There is a slow-Hellshreiber "X" to the left of the balloon!

The BASIC program listing:

5 LET C = 44
6 PRINT BT
7 IF BT < 3200    * check for 3.2v or sleep
8 SLEEP 10 1
9 GOTO 6
10 ENDIF
15 PRINT BT
18 IF BT > 3600   * look for 3.6v for high power mode else low power mode
19 LET I = 1
21 GOTO 26
22 ENDIF
24 LET I = 0
26 LET FR = 26999800        * set reference oscillator for epson tcxo
27 OUT 9 0
28 GPS 304 "$PSIMNAV,W,3*3A"       * sim28 high altitude string
29 OUT 9 CL
32 SLEEP 10 3
33 OUT 9 0
41 CW 0 14096950 12 0 " VA3UAL"
42 CW 0 14096920 5 0 "*010A3755370A*"    *set glyphs lower on qrss 20m band
43 CW 0 14096920 5 0 "*01IFLCNAP8Q7R6R5S0S0S5R6R7Q8PANCLFI*"
45 TELE
47 HELL 0 14096920 20 8 "QRP"           * compare x to slow hell for qrss penetration
48 CW 0 10140040 5 0 "*010A3755370A*"     *30m glyph ident
49 CW 0 10140040 5 0 "*01IFLCNAP8Q7R6R5SOSOS5R6R7QPANCLFI*"
50 GOTO 15




VA3UAL  14097165   362 bytes compiled   firmware v.33
ch44 start minute 04 tele 06
6 solar cells only so set the high power level lower at 3.6v
Normal lowest flight voltage should be 3.42 volts with 6 solar cells

10assembly.jpg 10bottom.jpg 10bottomdetail.jpg

10top.jpg 10wrapped.jpg IMG_20200531_192614_2.jpg

IMG_20200531_192641_8.jpg IMG_20200531_192752_5.jpg U4B10.jpg