From kstewart@demon.co.uk Thu Oct 12 20:30:00 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!demon!kstewart
From: kstewart@demon.co.uk (Kenji Stewart)
Newsgroups: comp.dsp
Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Oct12.203000.8735@demon.co.uk>
Date: Thu, 12 Oct 1995 20:30:00 GMT
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Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings.

The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20).
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.

-- 
Kenji Stewart
Opinions expressed are solely my own and not those of Demon Internet Services UK.
------------------------------------------------------------

From aeriksson@demon.co.uk Sat Oct 14 23:33:00 1995
Path: ashpoly!cascade!brgate!saturno!demon!aeriksson
From: aeriksson@demon.co.uk (Astrid Eriksson)
Newsgroups: comp.dsp
Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Oct14.233300.6054@demon.co.uk>
Date: Sat, 14 Oct 1995 23:33:00 GMT
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In article <1995Oct12.203000.8735@demon.co.uk>, kstewart@demon.co.uk (Kenji Stewart) writes:
> Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings.

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

PGP Public key available via finger or upon request.

-- 
Astrid Eriksson -- Demon Internet Services UK
"Marcus is not one man."

From aokonkwo@clari.net Tue Oct 17 00:29:00 1995
Path: ashpoly!cascade!transat!ukc!fennimore!clari!aokonkwo
From: aokonkwo@clari.net (Astrid Okonkwo)
Newsgroups: comp.dsp
Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Oct17.002900.1371@clari.net>
Date: Tue, 17 Oct 1995 00:29:00 GMT
References: <1995Oct12.203000.8735@demon.co.uk>
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In article <1995Oct12.203000.8735@demon.co.uk>, kstewart@demon.co.uk (Kenji Stewart) writes:
> Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings.
> The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20).

Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame.

-- 
Astrid Okonkwo -- ClariNet Communications Corp
"The hatch is open. Is anyone listening?"

From mramirez@inria.fr Wed Oct 18 03:40:00 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!inria!mramirez
From: mramirez@inria.fr (Mikhail Ramírez)
Newsgroups: comp.dsp
Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Oct18.034000.8345@inria.fr>
Date: Wed, 18 Oct 1995 03:40:00 GMT
References: <1995Oct12.203000.8735@demon.co.uk> <1995Oct17.002900.1371@clari.net>
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In article <1995Oct17.002900.1371@clari.net>, aokonkwo@clari.net (Astrid Okonkwo) writes:
> Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame.

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

Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns.

-- 
=== Mikhail Ramírez ===
Dept of Electrical Engineering, INRIA Rocquencourt
"5 sigma is a discovery. 7 is a question."