SwissCube BFSK decoded
I decoded SwissCube BFSK 'keep-alive' signal which was received by JA0CAW on 20 Jan 2011
over Japan. I got the result similar to what JA0CAW showed when I analyzed it with
'Spectrogram'. And I did a test to forward the analysis result to the server with 'MixW',
'OnlineKiss+', and 'DownlinkForwarder' softwares. And I succeeded in this test.
Successively I decoded BFSK 'housekeeping' kiss file which was received by DK3WN on
21 Jan 2011 over Germany with 'SwissCube Housekeeping Telemetry Decoder'.
Because he is developing it now, this software is not yet opened to the public.
The 'keep-alive' signal includes only a frame number and timestamp, and there is no
really useful information in it. And the 'housekeeping' signal include very important
information such as a current, voltage, and status. These 'housekeeping' signal are
transmitted only when passing above Switzerland. So you cannot make an experiment to
receive unfortunately in the other areas.
SwissCube BFSK
Frames: AX.25
Measured frequency inside thermal chamber: 437.500 to 437.506 MHz
Modulation: BFSK
Antenna: UHF
Transceiver mode: USB
Bitrate: 1200bps
Activated manually from the ground only when passing above Switzerland
by day with fully charged batteries.
http://swisscube-live.ch/
http://swisscube.epfl.ch/
SwissCube mp3 'keep-alive' frame mp3 file received by JA0CAW at 13:14UTC, 20 Jan 2011
SwissCube kiss 'housekeeping' frame kiss file received by DK3WN at 13:15UTC, 21 Jan 2011
And I decoded 'keep-alive' frame mp3 file with MixW Ver3.01b.
Subject: [amsat-bb] Re: SwissCube BFSK decoded
From: Mike Rupprecht
To: Mineo Wakita
Date: Sun, 23 Jan 2011 00:28:51 +0100
Mineo san,
If you use the TNC emulation of MixW and ONLINEKISS you can get the kiss file.
The frames you are decoded are "keep alive" frames containing only a frame
number and timestamp.
from HB9EG1-1 to HB9EG1: 00 DA 9E FF B0 27 E1 9C BD
from HB9EG1-1 to HB9EG1: 00 DD 9F FF B0 27 E1 9D 00
from HB9EG1-1 to HB9EG1: 00 DC A0 FF B0 27 E1 9D 43
from HB9EG1-1 to HB9EG1: 00 DD A1 FF B0 27 E1 9D 86
from HB9EG1-1 to HB9EG1: 00 DE A2 FF B0 27 E1 9D C9
from HB9EG1-1 to HB9EG1: 00 DF A3 FF B0 27 E1 9E 0C
from HB9EG1-1 to HB9EG1: 00 E0 A4 FF B0 27 E1 9E 4F
from HB9EG1-1 to HB9EG1: 00 E1 A5 FF B0 27 E1 9E 92
With good luck you can grab a housekeeping frame.
See a sample here: http://www.dk3wn.info/p/?p=19805
Dewa, Mike
DK3WN
-----Ursprungliche Nachricht-----
Von: amsat-bb-bounces
Auftrag von Mineo Wakita
Gesendet: Saturday, January 22, 2011 11:32 PM
An: amsat-bb@amsat.org
Betreff: [amsat-bb] SwissCube BFSK decoded
I decoded SwissCube BFSK signal which was received by JA0CAW
on 20 Jan 2011 over Japan.
http://www.ne.jp/asahi/hamradio/je9pel/swiscube.htm
JE9PEL, Mineo Wakita
---------------------------------
Subject: Re: SwissCube BFSK decoded
From: Mineo Wakita
To: Mike Rupprecht
Date: Sun, 23 Jan 2011 10:01:08 +0900
Hi Mike,
Thanks for your suggestion.
I used TNC emulation of MixW3 and OnlineKiss+.
Then I got three kiss, hex, and dump files.
[23012011_0015.hex]
00 DE A2 FF B0 27 E1 9D C9
00 DE A2 FF B0 27 E1 9D C9
00 DF A3 FF B0 27 E1 9E 0C
00 F6 BA FF B0 27 E1 A4 11
00 19 DD FF B0 27 E1 AD 3C
00 1A DE FF B0 27 E1 AD 7F
00 1B DF FF B0 27 E1 AD C2
00 1C E0 FF B0 27 E1 AE 05
00 1D E1 FF B0 27 E1 AE 48
00 1E E2 FF B0 27 E1 AE 8B
...
I forwarded these frames to Server using 'DownlinkForwarder.exe'.
(ie.) MixW3 --> OnlineKiss+ --> DownlinkForwarder
'DownlinkForwarder' software of the control station is available from the following HP.
http://swisscube-live.ch/
It's necessary to edit 'DownlinkForwarder.exe.config' beforehand.
[DownlinkForwarder.exe.config] ----------------------------------------
<?xml version="1.0"?>
<configuration>
<appSettings>
<!-- Downlink KISS TNC COM Port -->
<!-- 1. Set correct serial port name of KISS TNC -->
<add key="DownlinkTncComPort" value="COM8" />
<!-- Credentials to swisscube-live.ch -->
<!-- 2. Set your callsign and password on swisscube-live.ch -->
<add key="Callsign" value="je9pel" />
<add key="Password" value="******" />
<!-- Downlink Forwarder URL -->
<!-- 3. Comment/remove the following line to disable forwarding -->
<add key="DownlinkForwarderUrl" value="http://swisscube-live.ch/DownlinkForwarder/SendFrame/" />
<!-- KISS file storage location (can be absolute or relative) -->
<!-- The application can only create a folder one level below an existing one, create them manualy for more. -->
<add key="KissFilesLocation" value="files" />
</appSettings>
</configuration>
-----------------------------------------------------------------------
Successively I decoded BFSK 'housekeeping' kiss file which was received by DK3WN
with 'SwissCube Housekeeping Telemetry Decoder' (swisscube_hk.exe Ver 0.1 beta).
Because he is developing it now, this software is not yet opened to the public.
These 'housekeeping' signal are transmitted only when passing above Switzerland,
so you cannot make an experiment to receive unfortunately in the other areas.
SwissCube Housekeeping Telemetry Decoder (c) Mike Rupprecht, DK3WN
====================================================================
COM last report time 79525.00 s (0d 22:05:25)
ADCS last report time 0
CDMS last report time 0
Payload last report time 0
Battery 1 Voltage 3.89 V
Battery 2 Voltage 4.00 V
Battery 1 Temp -3 C
Digital power bus V 3.30 V
External Temp -4 C
Microcontroller Temp -18 C
Motherboard Temp -6 C
Solar cell +X current 19.54 mA
Solar cell +Y current 0.00 mA
Solar cell +Z current 11.72 mA
Face +X temperature -5 C
Face +Y temperature -18 C
Face +Z temperature -4 C
Payload ENABLED
ADS 1/2 status OFF
ADCS status OFF
Beacon status ON
Payload error flag OK
CDMS error flag OK
EPS error flag OK
Spacecraft mode SAFE
Battery 1 redundancy V 3.89 V
Battery 2 redundancy V 4.00 V
Battery 2 Temp -4 C
Analog power bus V 3.26 V
Analog power bus V 3.26 V
Frame Temp -16 C
Board Temp -13 C
Solar cell -X current 3.91 mA
Solar cell -Y current 62.52 mA
Solar cell -Z current 496.21 mA
Face -X temperature -7 C
Face -Y temperature -2 C
Face -Z temperature -8 C
ADCS ENABLED
Payload status OFF
CDMS status OFF
COM status ON
ADCS error flag OK
COM error flag OK
Spare 2 bits (not used) 0 0
Error code SUCCESS
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