Gaussian Minimum Shift Keying...some of the soundcard software will decode it, as will some packet modems. My suggestion is to watch some of the more active JA hams webpages and blogs for the best information on how to use these if and when they are opened for amateur use. JE9PEL is one page I look at often for information on the JA satellites http://www.ne.jp/asahi/hamradio/je9pel/

I sure wish some of these carried Mode J transponders, but I'll probably try the digital payloads when available. It looks like they are using the V/U system for initial checkout, and then to the 8GHz link once it's stabilized and usable.

73, Drew KO4MA

-----Original Message----- From: AMSAT-BB [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Mark Lunday Sent: Sunday, February 07, 2016 12:22 PM To: amsat-bb@amsat.org Subject: [amsat-bb] Chubusat question

Under the information for Chubusat 2 it says:

<QUOTE>

ChubuSat-2 provides the message exchange service. After the on-orbit checkout of the satellite, you can use the service, sending your message with amateur VHF (145.815MHz FSK 1200bps) then your message is written to the on-board memory. Anyone can read your message with amateur UHF (437.1MHz GMSK 9600bps) by sending inquiry message. The uplink/downlink format will be available in this page.

<END QUOTE>

I understand the 145.815 1200 bps FSK - this is the same as for NO-44, NO-84 and ISS.

But what is GMSK 9600? How is that decoded? And how does one request a 'message read' on this cubesat?

Mark Lunday, WD4ELG Greensboro, NC FM06be wd4elg@arrl.net http://wd4elg.blogspot.com

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