From kdubois@rwth-aachen.de Mon Jan 09 21:28:57 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!rwth-aachen!kdubois From: kdubois@rwth-aachen.de (Kirsty Dubois) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan09.212857.4208@rwth-aachen.de> Date: Mon, 09 Jan 1995 21:28:57 GMT Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 11 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Kirsty Dubois Practical Peripherals 14.4 @ 14,400 bps "A soul is not exclusive to biology." From frobertson@rwth-aachen.de Wed Jan 11 11:47:57 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!rwth-aachen!frobertson From: frobertson@rwth-aachen.de (Freya Robertson) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan11.114757.5256@rwth-aachen.de> Date: Wed, 11 Jan 1995 11:47:57 GMT References: <1995Jan09.212857.4208@rwth-aachen.de> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Jan09.212857.4208@rwth-aachen.de>, kdubois@rwth-aachen.de (Kirsty Dubois) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Freya Robertson Practical Peripherals 14.4 @ 9600 Telebit bps "Marcus is not one man." From asmirnov@utexas.edu Thu Jan 12 00:01:57 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!utexas!asmirnov From: asmirnov@utexas.edu (Anja Smirnov) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan12.000157.2470@utexas.edu> Date: Thu, 12 Jan 1995 00:01:57 GMT References: <1995Jan09.212857.4208@rwth-aachen.de> <1995Jan11.114757.5256@rwth-aachen.de> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jan11.114757.5256@rwth-aachen.de>, frobertson@rwth-aachen.de (Freya Robertson) 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! -- Anja Smirnov | asmirnov@utexas.edu PGP Key fingerprint: B4AB CAA0 D311 33C3 "Keep the channels open."