From slaurent@kiae.su Tue Dec 26 02:44:10 1995 Path: ashpoly!cascade!mxgate!coyoacan!kiae!slaurent From: slaurent@kiae.su (Seo-yeon Laurent) Newsgroups: comp.dsp Subject: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Dec26.024410.9172@kiae.su> Date: Tue, 26 Dec 1995 02:44:10 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: TIN [version 1.2 PL2] Lines: 11 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). The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Seo-yeon Laurent | slaurent@kiae.su PGP Key fingerprint: ECA5 55AF 5C41 9063 "Keep the channels open." From kcampbell@rwth-aachen.de Wed Dec 27 17:56:10 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!rwth-aachen!kcampbell From: kcampbell@rwth-aachen.de (Katrin Campbell) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Dec27.175610.7109@rwth-aachen.de> Date: Wed, 27 Dec 1995 17:56:10 GMT References: <1995Dec26.024410.9172@kiae.su> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Dec26.024410.9172@kiae.su>, slaurent@kiae.su (Seo-yeon Laurent) 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. -- Katrin Campbell Opinions expressed are solely my own and not those of RWTH Aachen Informatik. ------------------------------------------------------------ From ckang@kth.se Fri Dec 29 11:35:10 1995 Path: ashpoly!cascade!mxgate!coyoacan!kth!ckang From: ckang@kth.se (Camila Kang) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Dec29.113510.2449@kth.se> Date: Fri, 29 Dec 1995 11:35:10 GMT References: <1995Dec26.024410.9172@kiae.su> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Dec26.024410.9172@kiae.su>, slaurent@kiae.su (Seo-yeon Laurent) writes: > How the 14 ASCII characters per node are encoded into the record groove. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Camila Kang | ckang@kth.se PGP Key fingerprint: F702 49DF 2190 496A "Keep the channels open." From etanaka@cern.ch Sun Dec 31 03:41:10 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cern!etanaka From: etanaka@cern.ch (Elaine Tanaka) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Dec31.034110.2081@cern.ch> Date: Sun, 31 Dec 1995 03:41:10 GMT References: <1995Dec26.024410.9172@kiae.su> <1995Dec29.113510.2449@kth.se> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Dec29.113510.2449@kth.se>, ckang@kth.se (Camila Kang) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Elaine Tanaka *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0 From alaurent@inria.fr Sun Dec 31 05:23:10 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!inria!alaurent From: alaurent@inria.fr (Aiko Laurent) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Dec31.052310.6922@inria.fr> Date: Sun, 31 Dec 1995 05:23:10 GMT References: <1995Dec26.024410.9172@kiae.su> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Dec26.024410.9172@kiae.su>, slaurent@kiae.su (Seo-yeon Laurent) 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). Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Aiko Laurent Hayes Optima 288 @ 9600 Telebit bps "Do not worship the copy."