From sito@stanford.edu Tue Jan 03 17:58:04 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!stanford!sito
From: sito@stanford.edu (Seo-yeon Ito)
Newsgroups: comp.dsp
Subject: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Jan03.175804.8881@stanford.edu>
Date: Tue, 03 Jan 1995 17:58:04 GMT
Organization: Stanford University Computer Systems Lab
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How the 14 ASCII characters per node are encoded into the record groove.

Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'.
The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code.

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

-- 
=== Seo-yeon Ito ===
Dept of Electrical Engineering, Stanford University Computer Systems Lab
"Measuring a record you own is listening, not piracy."

From creyes@uu.net Thu Jan 05 14:10:04 1995
Path: ashpoly!cascade!transat!ukc!fennimore!uu!creyes
From: creyes@uu.net (Camila Reyes)
Newsgroups: comp.dsp
Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Jan05.141004.8847@uu.net>
Date: Thu, 05 Jan 1995 14:10:04 GMT
References: <1995Jan03.175804.8881@stanford.edu>
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In article <1995Jan03.175804.8881@stanford.edu>, sito@stanford.edu (Seo-yeon Ito) 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.

-- 
Camila Reyes
Tape trading list upon request. SASE required for international mail.