1745 UTC
1756 UTC … isun0 itxa0 itxb6 ttxa65 ttxb66 tnap80 tab66 msep0 mcon53 sma117 smb90
Andy, G0SFJ: I’m pretty certain I have found some diagrams about the telemetry control of the YUBILEINY satellite: http://microsat.sm.bmstu.ru/pic/schemebig.gif shows the command station at Kaluga and http://microsat.sm.bmstu.ru/pic/Doka-b.gif shows the “DOKA-B” telemetry command system.
The documents are on a website deveoted to the Baumanets microsatellite but as the mission is very similar (similar scientific- educational project) I think it’s likely that this is the control system used.
Note the modem interface within the radio section of DOKA-B and interfacing directly into the main board. I looked at the screenshot from “Cool edit” and it struckme thatthere was a tone (synch?) at 24 kHz throughout, with 5 frames per second at what looked to me as 8 frequency separated tones per frame. Does that give 5*8 = 40 bits per second? and does the 8 bits imply a direct serial transfer (8N1, etc) ? So I’m thinking now that it isn’t WEFAX/APT and could be a direct serial portinto the onboard PC. 73 de andy G0SFJ
WXSat settings (no APT data transmission, no decoding !)
[Predefined 8]
Name=RS
Demodulation=1,1,0,1
AMParameters=3.000,2400.000,567.940,0.970,0.000100
FMParameters=1500.000,800.000,120.000
HSync=3,1040.000,2,2,0.0000,0.0500,0
Source=1,0.0000,1.0000,0.0000,1.0000
Amp=0.000,1.000,0.000,1.000
Display=2,0.250,1.000,1,0
Size=907,1.000
SubcarrierStart=1.000,12,12
StartTone1=300.0,1.00,4,1
StartTone2=675.0,1.00,4,1
StopTone=450.0,1.00,4,0
HeaderLines=2,0.050000,0.950000,800,0
NewFileName=0,0,0,0,0,0,0,0,0
Palette=
Header0=
Header1=
HeaderN=