[amsat-florida] Re: Dnepr Launch Information

Andrew Glasbrenner glasbrenner at mindspring.com
Thu Apr 12 17:29:11 PDT 2007

Thanks Keith, I just got this myself and was looking to forward it on. 
Interesting about the CP4 modulation type...

----- Original Message ----- 
From: "Keith N4ZQ" <n4zq at netzero.net>
To: <amsat-florida at amsat.org>
Sent: Thursday, April 12, 2007 7:10 PM
Subject: [amsat-florida] Dnepr Launch Information

> Message: 1
> Date: Wed, 11 Apr 2007 21:45:01 -0700
> From: CubeSat <cubesat at gmail.com>
> Subject: [CubeSat] Dnepr Launch Information
> CubeSat developers,
> This email is confirming that the Dnepr launch is still set for April 17,
> 2007 at 0646:35 UTC. The TLEs have been updated on our website, and we 
> plan
> on using the discussion board at http://polysat.calpoly.edu/irc/ to allow
> satellite trackers to discuss what's been found. We will also be posting
> updates from Kosmotras regarding the status of the launch as soon as we
> hear
> it on the website and the discussion boards.
> We are encouraging all participants with a groundstation to help track 
> CP4.
> CP4 will autonomously transmit a sensor snapshot once every two minutes
> while in orbit. This transmission will be on 437.325 MHz, at 1200bps FSK,
> using AX.25 packetized digital data. Please note that it is FSK, not AFSK,
> which will require you to set your radios to "single side band" (SSB)
> instead of "FM mode". This sensor snapshot is preceded by a six second CW
> preamble that can be decoded as the satellite's call sign. CP4's 
> autonomous
> beacon contains sensor data that can be used to determine satellite's
> health
> status. A program that can make sense of the binary data encoded in the
> AX.25 packets will be made available to community soon (probably
> through the
> PolySat website). The information in this beacon would be useful to us,
> along with the recorded receive signal strength, should any anomalies 
> occur
> early in our mission. We would like to encourage station operators to
> try to
> capture CP4's downlink and submit files to: polysat at gmail.com [or
> polysat at atl.calpoly.edu].
> Thank you all again for your participation,
> Lori Brooks
> _______________________________________________
> Via the AMSAT-Florida mailing list courtesy of AMSAT-NA
> AMSAT-Florida at amsat.org
> http://amsat.org/mailman/listinfo/amsat-florida

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