From kmacdonald@ox.ac.uk Sat Nov 18 20:55:23 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!ox!kmacdonald From: kmacdonald@ox.ac.uk (Karen MacDonald) Newsgroups: comp.dsp Subject: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov18.205523.4751@ox.ac.uk> Date: Sat, 18 Nov 1995 20:55:23 GMT Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Karen MacDonald "Row 14. No joke." Macintosh IIfx / FreeBSD 2.1 From llopez@cern.ch Sun Nov 19 14:55:23 1995 Path: ashpoly!cascade!bigsur!cern!llopez From: llopez@cern.ch (Lars López) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov19.145523.2022@cern.ch> Date: Sun, 19 Nov 1995 14:55:23 GMT References: <1995Nov18.205523.4751@ox.ac.uk> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Nov18.205523.4751@ox.ac.uk>, kmacdonald@ox.ac.uk (Karen MacDonald) 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. -- Lars López | llopez@cern.ch PGP Key fingerprint: 7E13 A1F7 AFF1 DEC1 "Keep the channels open." From msuzuki@inria.fr Mon Nov 20 16:06:23 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!inria!msuzuki From: msuzuki@inria.fr (Mike Suzuki) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov20.160623.8507@inria.fr> Date: Mon, 20 Nov 1995 16:06:23 GMT References: <1995Nov18.205523.4751@ox.ac.uk> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Nov18.205523.4751@ox.ac.uk>, kmacdonald@ox.ac.uk (Karen MacDonald) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Mike Suzuki Tape trading list upon request. SASE required for international mail. From lsokolov@delphi.com Wed Nov 22 18:29:23 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!delphi!lsokolov From: lsokolov@delphi.com (Lisa Sokolov) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov22.182923.3680@delphi.com> Date: Wed, 22 Nov 1995 18:29:23 GMT References: <1995Nov18.205523.4751@ox.ac.uk> <1995Nov20.160623.8507@inria.fr> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Nov20.160623.8507@inria.fr>, msuzuki@inria.fr (Mike Suzuki) 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. -- Lisa Sokolov -- Delphi Internet Services "The hatch is open. Is anyone listening?" From jvasiliev@illinois.edu Fri Nov 24 20:45:23 1995 Path: ashpoly!cascade!bigsur!illinois!jvasiliev From: jvasiliev@illinois.edu (Joachim Vasiliev) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov24.204523.3191@illinois.edu> Date: Fri, 24 Nov 1995 20:45:23 GMT References: <1995Nov18.205523.4751@ox.ac.uk> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Nov18.205523.4751@ox.ac.uk>, kmacdonald@ox.ac.uk (Karen MacDonald) 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. -- Joachim Vasiliev Opinions expressed are solely my own and not those of University of Illinois Urbana-Champaign. ------------------------------------------------------------