From nwatanabe@delphi.com Tue Dec 13 00:57:20 1994 Path: ashpoly!cascade!bigsur!delphi!nwatanabe From: nwatanabe@delphi.com (Natalia Watanabe) Newsgroups: comp.dsp Subject: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Dec13.005720.5861@delphi.com> Date: Tue, 13 Dec 1994 00:57:20 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 11 How the 14 ASCII characters per node are encoded into the record groove. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- === Natalia Watanabe === Dept of Electrical Engineering, Delphi Internet Services "In theory there is no difference between theory and practice." From bsouza@panix.com Wed Dec 14 08:43:20 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!panix!bsouza From: bsouza@panix.com (Bruno Souza) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Dec14.084320.2150@panix.com> Date: Wed, 14 Dec 1994 08:43:20 GMT References: <1994Dec13.005720.5861@delphi.com> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Dec13.005720.5861@delphi.com>, nwatanabe@delphi.com (Natalia Watanabe) writes: > How the 14 ASCII characters per node are encoded into the record groove. > The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Bruno Souza Opinions expressed are solely my own and not those of Public Access Unix of New York. ------------------------------------------------------------ From mduarte@uni-hamburg.de Fri Dec 16 03:14:20 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uni-hamburg!mduarte From: mduarte@uni-hamburg.de (Mathieu Duarte) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Dec16.031420.7245@uni-hamburg.de> Date: Fri, 16 Dec 1994 03:14:20 GMT References: <1994Dec13.005720.5861@delphi.com> <1994Dec14.084320.2150@panix.com> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Dec14.084320.2150@panix.com>, bsouza@panix.com (Bruno Souza) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Mathieu Duarte "When every node is whole, the channel opens." Atari TT030 / Linux 1.2.13 From bfischer@purdue.edu Sun Dec 18 02:35:20 1994 Path: ashpoly!cascade!mxgate!coyoacan!purdue!bfischer From: bfischer@purdue.edu (Bastien Fischer) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Dec18.023520.5425@purdue.edu> Date: Sun, 18 Dec 1994 02:35:20 GMT References: <1994Dec13.005720.5861@delphi.com> <1994Dec14.084320.2150@panix.com> <1994Dec16.031420.7245@uni-hamburg.de> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Dec16.031420.7245@uni-hamburg.de>, mduarte@uni-hamburg.de (Mathieu Duarte) 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. -- Bastien Fischer | bfischer@purdue.edu PGP Key fingerprint: 967B BD56 E109 7B35 "Keep the channels open." From lgirard@berkeley.edu Sun Dec 18 03:41:20 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!berkeley!lgirard From: lgirard@berkeley.edu (Lars Girard) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Dec18.034120.3592@berkeley.edu> Date: Sun, 18 Dec 1994 03:41:20 GMT References: <1994Dec13.005720.5861@delphi.com> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Dec13.005720.5861@delphi.com>, nwatanabe@delphi.com (Natalia Watanabe) writes: > How the 14 ASCII characters per node are encoded into the record groove. > The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Lars Girard "Row 14. No joke." Atari Falcon 030 / TOS 4.04