From aperez@ox.ac.uk Tue Jun 27 13:13:29 1995
Path: ashpoly!cascade!brgate!saturno!ox!aperez
From: aperez@ox.ac.uk (Amy Pérez)
Newsgroups: comp.dsp
Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Jun27.131329.3866@ox.ac.uk>
Date: Tue, 27 Jun 1995 13:13:29 GMT
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Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.

Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization.
The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code.

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

-- 
Amy Pérez
Tape trading list upon request. SASE required for international mail.

From mkim@rwth-aachen.de Wed Jun 28 06:00:29 1995
Path: ashpoly!cascade!brgate!saturno!rwth-aachen!mkim
From: mkim@rwth-aachen.de (Mateo Kim)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Jun28.060029.3816@rwth-aachen.de>
Date: Wed, 28 Jun 1995 06:00:29 GMT
References: <1995Jun27.131329.3866@ox.ac.uk>
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In article <1995Jun27.131329.3866@ox.ac.uk>, aperez@ox.ac.uk (Amy Pérez) writes:
> Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.

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

-- 
Mateo Kim
Opinions expressed are solely my own and not those of RWTH Aachen Informatik.
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From clee@purdue.edu Fri Jun 30 02:21:29 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!purdue!clee
From: clee@purdue.edu (Camila Lee)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Jun30.022129.9606@purdue.edu>
Date: Fri, 30 Jun 1995 02:21:29 GMT
References: <1995Jun27.131329.3866@ox.ac.uk> <1995Jun28.060029.3816@rwth-aachen.de>
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In article <1995Jun28.060029.3816@rwth-aachen.de>, mkim@rwth-aachen.de (Mateo Kim) writes:
> The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration!

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

-- 
Camila Lee
Tape trading list upon request. SASE required for international mail.

From dgirard@stanford.edu Fri Jun 30 10:20:29 1995
Path: ashpoly!cascade!mxgate!coyoacan!stanford!dgirard
From: dgirard@stanford.edu (Dave Girard)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Jun30.102029.1335@stanford.edu>
Date: Fri, 30 Jun 1995 10:20:29 GMT
References: <1995Jun27.131329.3866@ox.ac.uk> <1995Jun28.060029.3816@rwth-aachen.de> <1995Jun30.022129.9606@purdue.edu>
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In article <1995Jun30.022129.9606@purdue.edu>, clee@purdue.edu (Camila Lee) writes:
> The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration!

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

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

From hsilva@ox.ac.uk Sat Jul 01 10:40:29 1995
Path: ashpoly!cascade!transat!eunet-fr!teletel!ox!hsilva
From: hsilva@ox.ac.uk (Heather Silva)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Jul01.104029.6162@ox.ac.uk>
Date: Sat, 01 Jul 1995 10:40:29 GMT
References: <1995Jun27.131329.3866@ox.ac.uk> <1995Jun28.060029.3816@rwth-aachen.de>
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In article <1995Jun28.060029.3816@rwth-aachen.de>, mkim@rwth-aachen.de (Mateo Kim) writes:
> The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration!

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

-- 
Heather Silva
Opinions expressed are solely my own and not those of Oxford University Computing Laboratory.
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