From tsilva@panix.com Sat May 14 10:47:01 1994
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!panix!tsilva
From: tsilva@panix.com (Tobias Silva)
Newsgroups: comp.dsp
Subject: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994May14.104701.8243@panix.com>
Date: Sat, 14 May 1994 10:47:01 GMT
Organization: Public Access Unix of New York
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Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.

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.

-- 
Tobias Silva -- Public Access Unix of New York
"Row 14. No joke."

From bito@netcom.com Sun May 15 10:32:01 1994
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!netcom!bito
From: bito@netcom.com (Bill Ito)
Newsgroups: comp.dsp
Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994May15.103201.9237@netcom.com>
Date: Sun, 15 May 1994 10:32:01 GMT
References: <1994May14.104701.8243@panix.com>
Organization: NETCOM On-Line Communication Services
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In article <1994May14.104701.8243@panix.com>, tsilva@panix.com (Tobias Silva) writes:
> Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.
> The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20).

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

-- 
Bill Ito -- NETCOM On-Line Communication Services
"We don't sign stars. We build them."

From sfischer@earthlink.net Mon May 16 22:50:01 1994
Path: ashpoly!cascade!transat!eunet-de!hansebox!earthlink!sfischer
From: sfischer@earthlink.net (Sven Fischer)
Newsgroups: comp.dsp
Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994May16.225001.9861@earthlink.net>
Date: Mon, 16 May 1994 22:50:01 GMT
References: <1994May14.104701.8243@panix.com> <1994May15.103201.9237@netcom.com>
Organization: EarthLink Network
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In article <1994May15.103201.9237@netcom.com>, bito@netcom.com (Bill Ito) writes:
> The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code.

The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration!

Unsubscribe me from this list! (Wait, this is Usenet, never mind).

-- 
=== Sven Fischer ===
Dept of Electrical Engineering, EarthLink Network
"When every node is whole, the channel opens."

From dsato@unam.mx Wed May 18 18:31:01 1994
Path: ashpoly!bigsur!pacrim!jpgate!kamome!unam!dsato
From: dsato@unam.mx (Diego Sato)
Newsgroups: comp.dsp
Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994May18.183101.2883@unam.mx>
Date: Wed, 18 May 1994 18:31:01 GMT
References: <1994May14.104701.8243@panix.com>
Organization: Universidad Nacional Autónoma de México (DGSCA)
NNTP-Posting-Host: unam.mx
X-Newsreader: Netscape 1.1N
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In article <1994May14.104701.8243@panix.com>, tsilva@panix.com (Tobias Silva) writes:
> Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.
> 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!

-- 
Diego Sato | dsato@unam.mx
PGP Key fingerprint: AEF7 B27A CEBE E897
"Keep the channels open."