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U3S

Live tracking
Day 2 update: 16-Sep-2020
Day 1 update: 15-Sep-2020
Launch photos
Transmitter

This is the 11'th test flight of the new U4B tracker. For details see below.

U4B-11 was launched on 15-Sep-2020 and quickly reached 12,000m altitude. It also flew well on 16-Sep-2020 but was not heard from after that so presumably sprung a leak. 


Live tracking



Day 2 update: 17-Sep-2020

noaa.png


Day 1 update: 16-Sep-2020

2020-09-15_T15-56-G0FTD.jpg noaa.png


Launch photos

IMG_20200915_070705427.jpg IMG_20200915_070914087.jpg IMG_20200915_070931611.jpg

IMG_20200915_070935453.jpg IMG_20200915_070936296.jpg IMG_20200915_070937578.jpg

IMG_20200915_070939041.jpg IMG_20200915_070941571.jpg IMG_20200915_070945228.jpg

IMG_20200915_070947704.jpg


Transmitter

This is the 11'th test flight of the new U4B tracker. U4B-11 was assembled by Dave VE3KCL. This YouTube video explains the features of the U4B tracker. 

U4B-11 includes a balloon glyph, with "11" just next to it; it also includes a slow-Hellshreiber "QRP" at minute :06 :16 :26 etc!

The BASIC program listing:

5 LET C = 43
6 PRINT BT
7 IF BT < 2850 * check for 2.85v or more
8 SLEEP 10 1
9 GOTO 6
10 ENDIF
15 PRINT BT
18 IF BT > 3300 * if over 3.3v go high power mode will use 55 ma.
19 LET I = 1
21 GOTO 26
22 ENDIF
24 LET I = 0 * go low power mode will use 37 ma.
26 LET FR = 26999800
27 OUT 9 0 * turn off led
29 GPS 304 "$PSIMNAV,W,3*3A"
30 OUT 9 CL * turn on led if gps locked
31 PRINT FR
32 SLEEP 10 1
33 OUT 9 0 * turn off led before transmission
41 CW 0 14096950 12 0 " VE3KCL"
42 CW 0 14096920 5 0 "*019630 9630*" * graphic 11
43 CW 0 14096920 5 0 "*01IFLCNAP8Q7R6R5S0S0S5R6R7Q8PANCLFI*" * balloon glyph 20m
44 TELE
47 HELL 0 14096920 16 8 "QRP" *slow hell tx to compare qrss penetration
48 CW 0 10140020 5 0 "*019630 9630*"
49 CW 0 10140020 5 0 "*01IFLCNAP8Q7R6R5S0S0S5R6R7Q8PANCLFI*" * balloon glyph 30m
50 GOTO 15
A0 shorted to ground to evoke usb mode
first tx on minute 1
first wspr on minute 2
VE3KCL 14097165 compile 374 bytes
Lowering threshold voltages as using only 6 solar cells to see if it starts earlier than 20 degrees above horz

Photos

11_bottom_585_gm.jpg 11_topview.jpg 11_weightandbalance.jpg

11_with_antenna.jpg Testing_on_the_back_deck.png glyph-11.png