From soliveira@cmu.edu Fri Aug 02 03:01:55 1996
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cmu!soliveira
From: soliveira@cmu.edu (Seo-yeon Oliveira)
Newsgroups: comp.dsp
Subject: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Aug02.030155.8960@cmu.edu>
Date: Fri, 02 Aug 1996 03:01:55 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.
Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'.

The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design.

-- 
Seo-yeon Oliveira
Tape trading list upon request. SASE required for international mail.

From mweber@ox.ac.uk Sat Aug 03 13:50:55 1996
Path: ashpoly!cascade!transat!sunet!nordrelay!ox!mweber
From: mweber@ox.ac.uk (Marisol Weber)
Newsgroups: comp.dsp
Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Aug03.135055.3150@ox.ac.uk>
Date: Sat, 03 Aug 1996 13:50:55 GMT
References: <1996Aug02.030155.8960@cmu.edu>
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In article <1996Aug02.030155.8960@cmu.edu>, soliveira@cmu.edu (Seo-yeon Oliveira) writes:
> How the 14 ASCII characters per node are encoded into the record groove.

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

-- 
Marisol Weber | mweber@ox.ac.uk
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"Keep the channels open."