From mmacdonald@mindspring.com Fri Sep 01 14:41:42 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!mindspring!mmacdonald
From: mmacdonald@mindspring.com (Mikhail MacDonald)
Newsgroups: comp.dsp
Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Sep01.144142.5894@mindspring.com>
Date: Fri, 01 Sep 1995 14:41:42 GMT
Organization: MindSpring Enterprises
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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).
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.

-- 
Mikhail MacDonald | mmacdonald@mindspring.com
PGP Key fingerprint: 401C 9EDA 20F5 96CA
"Keep the channels open."

From esantos@berkeley.edu Sat Sep 02 23:46:42 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!berkeley!esantos
From: esantos@berkeley.edu (Emi Santos)
Newsgroups: comp.dsp
Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Sep02.234642.4488@berkeley.edu>
Date: Sat, 02 Sep 1995 23:46:42 GMT
References: <1995Sep01.144142.5894@mindspring.com>
Organization: UC Berkeley Department of EECS
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In article <1995Sep01.144142.5894@mindspring.com>, mmacdonald@mindspring.com (Mikhail MacDonald) 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.

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

-- 
Emi Santos
Opinions expressed are solely my own and not those of UC Berkeley Department of EECS.
------------------------------------------------------------

From thughes@illinois.edu Mon Sep 04 09:34:42 1995
Path: ashpoly!cascade!mxgate!coyoacan!illinois!thughes
From: thughes@illinois.edu (Thiago Hughes)
Newsgroups: comp.dsp
Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Sep04.093442.3037@illinois.edu>
Date: Mon, 04 Sep 1995 09:34:42 GMT
References: <1995Sep01.144142.5894@mindspring.com> <1995Sep02.234642.4488@berkeley.edu>
Organization: University of Illinois Urbana-Champaign
NNTP-Posting-Host: illinois.edu
X-Newsreader: NewsWatcher 2.0b24
Lines: 10

In article <1995Sep02.234642.4488@berkeley.edu>, esantos@berkeley.edu (Emi Santos) writes:
> Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame.
> Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns.

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

-- 
Thiago Hughes | thughes@illinois.edu
PGP Key fingerprint: DF5F E352 DA73 D73C
"Keep the channels open."