From iandersson@earthlink.net Wed Oct 05 18:24:38 1994
Path: ashpoly!cascade!transat!eunet-de!hansebox!earthlink!iandersson
From: iandersson@earthlink.net (Ines Andersson)
Newsgroups: comp.dsp
Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994Oct05.182438.5536@earthlink.net>
Date: Wed, 05 Oct 1994 18:24:38 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.

-- 
Ines Andersson
Opinions expressed are solely my own and not those of EarthLink Network.
------------------------------------------------------------

From scampbell@mindspring.com Fri Oct 07 05:45:38 1994
Path: ashpoly!bigsur!pacrim!krgate!eunha!mindspring!scampbell
From: scampbell@mindspring.com (Sven Campbell)
Newsgroups: comp.dsp
Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994Oct07.054538.7661@mindspring.com>
Date: Fri, 07 Oct 1994 05:45:38 GMT
References: <1994Oct05.182438.5536@earthlink.net>
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In article <1994Oct05.182438.5536@earthlink.net>, iandersson@earthlink.net (Ines Andersson) 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.

-- 
Sven Campbell
Tape trading list upon request. SASE required for international mail.

From dgarcia@panix.com Fri Oct 07 13:25:38 1994
Path: ashpoly!cascade!mxgate!coyoacan!panix!dgarcia
From: dgarcia@panix.com (Dmitri García)
Newsgroups: comp.dsp
Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994Oct07.132538.7036@panix.com>
Date: Fri, 07 Oct 1994 13:25:38 GMT
References: <1994Oct05.182438.5536@earthlink.net>
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In article <1994Oct05.182438.5536@earthlink.net>, iandersson@earthlink.net (Ines Andersson) 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).

A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single!

-- 
Dmitri García -- Public Access Unix of New York
"In theory there is no difference between theory and practice."

From akowalski@utexas.edu Sat Oct 08 05:58:38 1994
Path: ashpoly!cascade!transat!ukc!fennimore!utexas!akowalski
From: akowalski@utexas.edu (Aiko Kowalski)
Newsgroups: comp.dsp
Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994Oct08.055838.1765@utexas.edu>
Date: Sat, 08 Oct 1994 05:58:38 GMT
References: <1994Oct05.182438.5536@earthlink.net> <1994Oct07.132538.7036@panix.com>
Organization: University of Texas at Austin
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In article <1994Oct07.132538.7036@panix.com>, dgarcia@panix.com (Dmitri García) writes:
> A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single!

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

-- 
Aiko Kowalski -- University of Texas at Austin
"When every node is whole, the channel opens."