From hjohansson@pacbell.net Tue Aug 02 04:19:24 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!pacbell!hjohansson From: hjohansson@pacbell.net (Heather Johansson) Newsgroups: comp.dsp Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Aug02.041924.7680@pacbell.net> Date: Tue, 02 Aug 1994 04:19:24 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 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). Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Heather Johansson -- Pacific Bell Internet Services "Row 14. No joke." From oandersson@mit.edu Thu Aug 04 01:49:24 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!mit!oandersson From: oandersson@mit.edu (Olga Andersson) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Aug04.014924.6306@mit.edu> Date: Thu, 04 Aug 1994 01:49:24 GMT References: <1994Aug02.041924.7680@pacbell.net> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Aug02.041924.7680@pacbell.net>, hjohansson@pacbell.net (Heather Johansson) 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. -- Olga Andersson SupraFAXModem 28.8 @ 28,800 bps "A soul is not exclusive to biology." From shernandez@unam.mx Fri Aug 05 23:10:24 1994 Path: ashpoly!cascade!transat!ukc!fennimore!unam!shernandez From: shernandez@unam.mx (Sun-mi Hernández) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Aug05.231024.9007@unam.mx> Date: Fri, 05 Aug 1994 23:10:24 GMT References: <1994Aug02.041924.7680@pacbell.net> <1994Aug04.014924.6306@mit.edu> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1994Aug04.014924.6306@mit.edu>, oandersson@mit.edu (Olga Andersson) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Sun-mi Hernández Tape trading list upon request. SASE required for international mail.