From sreyes@demon.co.uk Mon Mar 25 09:12:59 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!demon!sreyes From: sreyes@demon.co.uk (Sun-mi Reyes) Newsgroups: comp.dsp Subject: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Mar25.091259.2907@demon.co.uk> Date: Mon, 25 Mar 1996 09:12:59 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: Netscape 1.1N Lines: 11 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. 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. -- Sun-mi Reyes *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0 From srobertson@kiae.su Tue Mar 26 06:46:59 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!kiae!srobertson From: srobertson@kiae.su (Seo-yeon Robertson) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Mar26.064659.8852@kiae.su> Date: Tue, 26 Mar 1996 06:46:59 GMT References: <1996Mar25.091259.2907@demon.co.uk> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Mar25.091259.2907@demon.co.uk>, sreyes@demon.co.uk (Sun-mi Reyes) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Seo-yeon Robertson Opinions expressed are solely my own and not those of Kurchatov Institute of Atomic Energy, Moscow. ------------------------------------------------------------ From mramirez@stanford.edu Thu Mar 28 05:48:59 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!stanford!mramirez From: mramirez@stanford.edu (Marisol Ramírez) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Mar28.054859.6538@stanford.edu> Date: Thu, 28 Mar 1996 05:48:59 GMT References: <1996Mar25.091259.2907@demon.co.uk> <1996Mar26.064659.8852@kiae.su> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Mar26.064659.8852@kiae.su>, srobertson@kiae.su (Seo-yeon Robertson) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- === Marisol Ramírez === Dept of Electrical Engineering, Stanford University Computer Systems Lab "A soul is not exclusive to biology." From ikuznetsov@inria.fr Sat Mar 30 02:50:59 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!inria!ikuznetsov From: ikuznetsov@inria.fr (Ines Kuznetsov) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Mar30.025059.1905@inria.fr> Date: Sat, 30 Mar 1996 02:50:59 GMT References: <1996Mar25.091259.2907@demon.co.uk> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Mar25.091259.2907@demon.co.uk>, sreyes@demon.co.uk (Sun-mi Reyes) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Ines Kuznetsov *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From nschneider@pacbell.net Sun Mar 31 21:15:59 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pacbell!nschneider From: nschneider@pacbell.net (Nadia Schneider) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Mar31.211559.7578@pacbell.net> Date: Sun, 31 Mar 1996 21:15:59 GMT References: <1996Mar25.091259.2907@demon.co.uk> <1996Mar26.064659.8852@kiae.su> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1996Mar26.064659.8852@kiae.su>, srobertson@kiae.su (Seo-yeon Robertson) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Nadia Schneider Tape trading list upon request. SASE required for international mail.