From jpopov@uu.net Mon Jul 17 02:01:03 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!uu!jpopov
From: jpopov@uu.net (Jen Popov)
Newsgroups: comp.dsp
Subject: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Jul17.020103.1179@uu.net>
Date: Mon, 17 Jul 1995 02:01:03 GMT
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How the 14 ASCII characters per node are encoded into the record groove.

Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization.
The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20).

When all 14 rows are assembled, the matrix forms an 80-column ASCII status report.

-- 
Jen Popov
Tape trading list upon request. SASE required for international mail.

From smacdonald@demon.co.uk Mon Jul 17 05:33:03 1995
Path: ashpoly!cascade!transat!ukc!fennimore!demon!smacdonald
From: smacdonald@demon.co.uk (Sergei MacDonald)
Newsgroups: comp.dsp
Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Jul17.053303.1518@demon.co.uk>
Date: Mon, 17 Jul 1995 05:33:03 GMT
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In article <1995Jul17.020103.1179@uu.net>, jpopov@uu.net (Jen Popov) writes:
> How the 14 ASCII characters per node are encoded into the record groove.

On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text.

-- 
Sergei MacDonald
Opinions expressed are solely my own and not those of Demon Internet Services UK.
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From gstewart@cmu.edu Tue Jul 18 03:21:03 1995
Path: ashpoly!cascade!brgate!saturno!cmu!gstewart
From: gstewart@cmu.edu (Graham Stewart)
Newsgroups: comp.dsp
Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Jul18.032103.6727@cmu.edu>
Date: Tue, 18 Jul 1995 03:21:03 GMT
References: <1995Jul17.020103.1179@uu.net> <1995Jul17.053303.1518@demon.co.uk>
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In article <1995Jul17.053303.1518@demon.co.uk>, smacdonald@demon.co.uk (Sergei MacDonald) writes:
> On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text.

The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code.

Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin!

-- 
Graham Stewart -- Carnegie Mellon University School of CS
"Hardware is temporary. The signal survives."