University of Tokyo Cubesat

Some information from Ryu Funase on the University of Tokyo's cubesat, which is one of 3 cubesats that will be deployed by SSETI Express.

The SSETI Express Mission Operations pages can be seen at: http://sseti.gte.tuwien.ac.at/express/mop/

73 Trevor M5AKA

Hello all,

I'm Ryu Funase, at University of Tokyo ISSL (Intelligent Space Systems Laboratory).

As you all may know well, our second cubesat called "XI-V" (sai-five) will be launched on September 30th, which will be separated from SSETI Express.

XI-V uses amateur radio band to communicate with the ground station. We, XI-V team would appreciate it if you receive the signal from XI-V. You can send us the received data via email xi5report@space.t.u-tokyo.ac.jp, or upload any data file through the web format
http://www.space.t.u-tokyo.ac.jp/cubesat/upload/xi5report-e.aspx

The specification of the transmitter is as follows:
CW morse-coded signal is on 437.465MHz +/- doppler, output power is 80mW
FM packet of AFSK AX.25 is on 437.345MHz +/- doppler, output power is
800mW. The details can be seen at
http://www.space.t.u-tokyo.ac.jp/gs/satinfo-e.html#xi5

Althought the FM packet will not be transmitted unless commanded by the ground station at Tokyo, CW signal is always ON, so anyone can receive it. You can see the format of the CW signal at
http://www.space.t.u-tokyo.ac.jp/gs/application-e.html#xi5

As to the TLE, we will use that of SSETI Express (provided by Graham), as the separation velocity is so small that the deviation from the orbit of SSETI Express will be negligible for a few days.

Below shows the timeline.
Sep 30 06:52:26 (UTC) launch
Sep 30 08:37:26 (UTC) separation of XI-V
Sep 30 09:08:00 (UTC) start of CW transmission (which will occur over the pacific ocean)

Due to the power limitation, the initial interval of the CW signal is about 30 seconds, and it will be very difficult to catch its signal.

We really appreciate it if you could help us. Any format of received data is welcome.

If you have anything to ask, please contact me or send email to cube_info@space.t.u-tokyo.ac.jp

Best regards,
Ryu Funase

ISSL (Intelligent Space Systems Laboratory)
Department of Aeronautics and Astronautics
University of Tokyo
Ryu Funase
E-mail : funase@space.t.u-tokyo.ac.jp

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