From bcampbell@inria.fr Thu Jul 27 17:26:13 1995 Path: ashpoly!cascade!bigsur!inria!bcampbell From: bcampbell@inria.fr (Bill Campbell) Newsgroups: comp.dsp Subject: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul27.172613.3493@inria.fr> Date: Thu, 27 Jul 1995 17:26:13 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 11 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. 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. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Bill Campbell "5 sigma is a discovery. 7 is a question." Mac IIci / 68882 FPU / System 7.5.1 From msokolov@clari.net Sat Jul 29 19:59:13 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!clari!msokolov From: msokolov@clari.net (Mateo Sokolov) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul29.195913.1219@clari.net> Date: Sat, 29 Jul 1995 19:59:13 GMT References: <1995Jul27.172613.3493@inria.fr> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1995Jul27.172613.3493@inria.fr>, bcampbell@inria.fr (Bill Campbell) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Mateo Sokolov Opinions expressed are solely my own and not those of ClariNet Communications Corp. ------------------------------------------------------------ From mrobertson@clari.net Sun Jul 30 17:33:13 1995 Path: ashpoly!cascade!transat!ukc!fennimore!clari!mrobertson From: mrobertson@clari.net (Marta Robertson) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul30.173313.3491@clari.net> Date: Sun, 30 Jul 1995 17:33:13 GMT References: <1995Jul27.172613.3493@inria.fr> <1995Jul29.195913.1219@clari.net> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Jul29.195913.1219@clari.net>, msokolov@clari.net (Mateo Sokolov) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. > Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Marta Robertson | mrobertson@clari.net PGP Key fingerprint: AFFE 95DA 7DFB A271 "Keep the channels open." From jsilva@pacbell.net Tue Aug 01 20:20:13 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!pacbell!jsilva From: jsilva@pacbell.net (Ji-woo Silva) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug01.202013.2324@pacbell.net> Date: Tue, 01 Aug 1995 20:20:13 GMT References: <1995Jul27.172613.3493@inria.fr> <1995Jul29.195913.1219@clari.net> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Jul29.195913.1219@clari.net>, msokolov@clari.net (Mateo Sokolov) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. > Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Ji-woo Silva "When every node is whole, the channel opens." Mac IIci / 68882 FPU / AmigaOS 3.1 From sstewart@illinois.edu Thu Aug 03 05:33:13 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!illinois!sstewart From: sstewart@illinois.edu (Seo-yeon Stewart) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug03.053313.7798@illinois.edu> Date: Thu, 03 Aug 1995 05:33:13 GMT References: <1995Jul27.172613.3493@inria.fr> <1995Jul29.195913.1219@clari.net> <1995Jul30.173313.3491@clari.net> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Jul30.173313.3491@clari.net>, mrobertson@clari.net (Marta Robertson) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Seo-yeon Stewart -- University of Illinois Urbana-Champaign "When every node is whole, the channel opens."