From fsmirnov@utexas.edu Fri May 26 02:44:13 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!utexas!fsmirnov
From: fsmirnov@utexas.edu (Fiona Smirnov)
Newsgroups: comp.dsp
Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995May26.024413.6574@utexas.edu>
Date: Fri, 26 May 1995 02:44:13 GMT
Organization: University of Texas at Austin
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How the 14 ASCII characters per node are encoded into the record groove.

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'.

When all 14 rows are assembled, the matrix forms an 80-column ASCII status report.

-- 
Fiona Smirnov | fsmirnov@utexas.edu
PGP Key fingerprint: AF90 7B09 49EE 3C5C
"Keep the channels open."

From opark@mit.edu Fri May 26 06:59:13 1995
Path: ashpoly!cascade!transat!eunet-fr!teletel!mit!opark
From: opark@mit.edu (Olga Park)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995May26.065913.3224@mit.edu>
Date: Fri, 26 May 1995 06:59:13 GMT
References: <1995May26.024413.6574@utexas.edu>
Organization: Massachusetts Institute of Technology
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In article <1995May26.024413.6574@utexas.edu>, fsmirnov@utexas.edu (Fiona Smirnov) writes:
> How the 14 ASCII characters per node are encoded into the record groove.
> The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20).

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.

-- 
=== Olga Park ===
Dept of Electrical Engineering, Massachusetts Institute of Technology
"Hardware is temporary. The signal survives."

From vramirez@kiae.su Fri May 26 13:53:13 1995
Path: ashpoly!cascade!brgate!saturno!kiae!vramirez
From: vramirez@kiae.su (Valeria Ramírez)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995May26.135313.3434@kiae.su>
Date: Fri, 26 May 1995 13:53:13 GMT
References: <1995May26.024413.6574@utexas.edu> <1995May26.065913.3224@mit.edu>
Organization: Kurchatov Institute of Atomic Energy, Moscow
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In article <1995May26.065913.3224@mit.edu>, opark@mit.edu (Olga Park) writes:
> On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text.

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

Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin!

-- 
Valeria Ramírez | vramirez@kiae.su
PGP Key fingerprint: 929C 7E83 1F0D 1E4B
"Keep the channels open."

From egirard@netcom.com Fri May 26 16:56:13 1995
Path: ashpoly!cascade!brgate!saturno!netcom!egirard
From: egirard@netcom.com (Élodie Girard)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995May26.165613.6174@netcom.com>
Date: Fri, 26 May 1995 16:56:13 GMT
References: <1995May26.024413.6574@utexas.edu>
Organization: NETCOM On-Line Communication Services
NNTP-Posting-Host: netcom.com
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In article <1995May26.024413.6574@utexas.edu>, fsmirnov@utexas.edu (Fiona Smirnov) writes:
> How the 14 ASCII characters per node are encoded into the record groove.

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

-- 
Élodie Girard
Tape trading list upon request. SASE required for international mail.

From lsanchez@utexas.edu Sun May 28 10:43:13 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!utexas!lsanchez
From: lsanchez@utexas.edu (Lars Sánchez)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995May28.104313.9778@utexas.edu>
Date: Sun, 28 May 1995 10:43:13 GMT
References: <1995May26.024413.6574@utexas.edu> <1995May26.065913.3224@mit.edu>
Organization: University of Texas at Austin
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In article <1995May26.065913.3224@mit.edu>, opark@mit.edu (Olga Park) writes:
> 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.

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

-- 
Lars Sánchez
Opinions expressed are solely my own and not those of University of Texas at Austin.
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