From kmuller@cam.ac.uk Thu Sep 08 03:23:29 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!cam!kmuller From: kmuller@cam.ac.uk (Kirsty Müller) Newsgroups: comp.dsp Subject: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Sep08.032329.8127@cam.ac.uk> Date: Thu, 08 Sep 1994 03:23:29 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 10 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. 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 Müller Tape trading list upon request. SASE required for international mail. From gsuzuki@earthlink.net Fri Sep 09 19:52:29 1994 Path: ashpoly!cascade!brgate!saturno!earthlink!gsuzuki From: gsuzuki@earthlink.net (Graham Suzuki) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Sep09.195229.2934@earthlink.net> Date: Fri, 09 Sep 1994 19:52:29 GMT References: <1994Sep08.032329.8127@cam.ac.uk> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Sep08.032329.8127@cam.ac.uk>, kmuller@cam.ac.uk (Kirsty Müller) 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 Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- === Graham Suzuki === Dept of Electrical Engineering, EarthLink Network "We don't sign stars. We build them." From jdubois@unam.mx Sat Sep 10 08:17:29 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!unam!jdubois From: jdubois@unam.mx (Julien Dubois) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Sep10.081729.8736@unam.mx> Date: Sat, 10 Sep 1994 08:17:29 GMT References: <1994Sep08.032329.8127@cam.ac.uk> <1994Sep09.195229.2934@earthlink.net> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Sep09.195229.2934@earthlink.net>, gsuzuki@earthlink.net (Graham Suzuki) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Julien Dubois *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0 From tmuller@uni-hamburg.de Sun Sep 11 12:03:29 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uni-hamburg!tmuller From: tmuller@uni-hamburg.de (Tomas Müller) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Sep11.120329.2237@uni-hamburg.de> Date: Sun, 11 Sep 1994 12:03:29 GMT References: <1994Sep08.032329.8127@cam.ac.uk> <1994Sep09.195229.2934@earthlink.net> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1994Sep09.195229.2934@earthlink.net>, gsuzuki@earthlink.net (Graham Suzuki) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Tomas Müller Tape trading list upon request. SASE required for international mail.