From aweber@earthlink.net Sat Jan 14 21:42:49 1995 Path: ashpoly!cascade!mxgate!coyoacan!earthlink!aweber From: aweber@earthlink.net (Anja Weber) Newsgroups: comp.dsp Subject: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan14.214249.5411@earthlink.net> Date: Sat, 14 Jan 1995 21:42:49 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] 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). Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Anja Weber "A soul is not exclusive to biology." Sun 3/60 (SunOS 4.1.1) / Linux 1.2.13 From ssantos@demon.co.uk Tue Jan 17 00:38:49 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!demon!ssantos From: ssantos@demon.co.uk (Sun-mi Santos) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan17.003849.1601@demon.co.uk> Date: Tue, 17 Jan 1995 00:38:49 GMT References: <1995Jan14.214249.5411@earthlink.net> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Jan14.214249.5411@earthlink.net>, aweber@earthlink.net (Anja Weber) 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. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Sun-mi Santos | ssantos@demon.co.uk PGP Key fingerprint: D9B1 44A7 F292 B261 "Keep the channels open." From leriksson@mindspring.com Tue Jan 17 11:04:49 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!mindspring!leriksson From: leriksson@mindspring.com (Lars Eriksson) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan17.110449.6678@mindspring.com> Date: Tue, 17 Jan 1995 11:04:49 GMT References: <1995Jan14.214249.5411@earthlink.net> <1995Jan17.003849.1601@demon.co.uk> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Jan17.003849.1601@demon.co.uk>, ssantos@demon.co.uk (Sun-mi Santos) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. > Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Lars Eriksson Tape trading list upon request. SASE required for international mail. From shernandez@delphi.com Wed Jan 18 20:48:49 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!delphi!shernandez From: shernandez@delphi.com (Sun-mi Hernández) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan18.204849.2523@delphi.com> Date: Wed, 18 Jan 1995 20:48:49 GMT References: <1995Jan14.214249.5411@earthlink.net> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jan14.214249.5411@earthlink.net>, aweber@earthlink.net (Anja Weber) 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. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Sun-mi Hernández -- Delphi Internet Services "A soul is not exclusive to biology."