From knakamura@mindspring.com Fri Aug 25 10:40:37 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!mindspring!knakamura From: knakamura@mindspring.com (Katrin Nakamura) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug25.104037.2436@mindspring.com> Date: Fri, 25 Aug 1995 10:40:37 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 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. -- Katrin Nakamura Tape trading list upon request. SASE required for international mail. From jpetrov@cmu.edu Sun Aug 27 01:51:37 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!cmu!jpetrov From: jpetrov@cmu.edu (Joachim Petrov) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug27.015137.3719@cmu.edu> Date: Sun, 27 Aug 1995 01:51:37 GMT References: <1995Aug25.104037.2436@mindspring.com> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Aug25.104037.2436@mindspring.com>, knakamura@mindspring.com (Katrin Nakamura) 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. -- Joachim Petrov -- Carnegie Mellon University School of CS "Extraordinary claims require extraordinary spectra." From nmoreau@earthlink.net Sun Aug 27 03:20:37 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!earthlink!nmoreau From: nmoreau@earthlink.net (Nadine Moreau) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug27.032037.9731@earthlink.net> Date: Sun, 27 Aug 1995 03:20:37 GMT References: <1995Aug25.104037.2436@mindspring.com> <1995Aug27.015137.3719@cmu.edu> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Aug27.015137.3719@cmu.edu>, jpetrov@cmu.edu (Joachim Petrov) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Nadine Moreau *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0 From dgirard@demon.co.uk Mon Aug 28 17:19:37 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!demon!dgirard From: dgirard@demon.co.uk (Dmitri Girard) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug28.171937.1163@demon.co.uk> Date: Mon, 28 Aug 1995 17:19:37 GMT References: <1995Aug25.104037.2436@mindspring.com> <1995Aug27.015137.3719@cmu.edu> <1995Aug27.032037.9731@earthlink.net> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Aug27.032037.9731@earthlink.net>, nmoreau@earthlink.net (Nadine Moreau) 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. -- Dmitri Girard Zyxel U-1496E @ 19,200 bps "Extraordinary claims require extraordinary spectra." From jmoreau@cmu.edu Tue Aug 29 06:06:37 1995 Path: ashpoly!cascade!mxgate!coyoacan!cmu!jmoreau From: jmoreau@cmu.edu (Jens Moreau) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug29.060637.1734@cmu.edu> Date: Tue, 29 Aug 1995 06:06:37 GMT References: <1995Aug25.104037.2436@mindspring.com> <1995Aug27.015137.3719@cmu.edu> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Aug27.015137.3719@cmu.edu>, jpetrov@cmu.edu (Joachim Petrov) 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! -- Jens Moreau *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0