From avasiliev@inria.fr Wed Jul 19 22:33:56 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!inria!avasiliev From: avasiliev@inria.fr (Amy Vasiliev) Newsgroups: comp.dsp Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul19.223356.1571@inria.fr> Date: Wed, 19 Jul 1995 22:33:56 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Amy Vasiliev *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0 From skang@kiae.su Sat Jul 22 00:36:56 1995 Path: ashpoly!cascade!mxgate!coyoacan!kiae!skang From: skang@kiae.su (Steve Kang) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul22.003656.2837@kiae.su> Date: Sat, 22 Jul 1995 00:36:56 GMT References: <1995Jul19.223356.1571@inria.fr> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Jul19.223356.1571@inria.fr>, avasiliev@inria.fr (Amy Vasiliev) writes: > 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). A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Steve Kang "Hold for relay." Atari TT030 / SunOS 4.1.4 From hgonzalez@ox.ac.uk Sat Jul 22 12:07:56 1995 Path: ashpoly!cascade!transat!ukc!fennimore!ox!hgonzalez From: hgonzalez@ox.ac.uk (Hugo González) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul22.120756.6049@ox.ac.uk> Date: Sat, 22 Jul 1995 12:07:56 GMT References: <1995Jul19.223356.1571@inria.fr> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Jul19.223356.1571@inria.fr>, avasiliev@inria.fr (Amy Vasiliev) 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. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Hugo González -- Oxford University Computing Laboratory "The carrier frequency does not drift by accident." From sfournier@uu.net Sat Jul 22 16:58:56 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!uu!sfournier From: sfournier@uu.net (Steve Fournier) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul22.165856.1674@uu.net> Date: Sat, 22 Jul 1995 16:58:56 GMT References: <1995Jul19.223356.1571@inria.fr> <1995Jul22.120756.6049@ox.ac.uk> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Jul22.120756.6049@ox.ac.uk>, hgonzalez@ox.ac.uk (Hugo González) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! Top-posters will be placed in my ~/.killfile without notice. -- Steve Fournier Tape trading list upon request. SASE required for international mail. From kivanov@tum.de Mon Jul 24 10:34:56 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!tum!kivanov From: kivanov@tum.de (Karen Ivanov) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul24.103456.1491@tum.de> Date: Mon, 24 Jul 1995 10:34:56 GMT References: <1995Jul19.223356.1571@inria.fr> <1995Jul22.120756.6049@ox.ac.uk> <1995Jul22.165856.1674@uu.net> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Jul22.165856.1674@uu.net>, sfournier@uu.net (Steve Fournier) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Karen Ivanov *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0