From jkang@earthlink.net Mon Jan 22 16:46:36 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!earthlink!jkang From: jkang@earthlink.net (Ji-woo Kang) Newsgroups: comp.dsp Subject: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jan22.164636.6726@earthlink.net> Date: Mon, 22 Jan 1996 16:46:36 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 How the 14 ASCII characters per node are encoded into the record groove. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. 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. -- Ji-woo Kang Tape trading list upon request. SASE required for international mail. From msanchez@kiae.su Tue Jan 23 00:37:36 1996 Path: ashpoly!cascade!transat!ukc!fennimore!kiae!msanchez From: msanchez@kiae.su (Mike Sánchez) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jan23.003736.9641@kiae.su> Date: Tue, 23 Jan 1996 00:37:36 GMT References: <1996Jan22.164636.6726@earthlink.net> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1996Jan22.164636.6726@earthlink.net>, jkang@earthlink.net (Ji-woo Kang) writes: > How the 14 ASCII characters per node are encoded into the record groove. > Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Mike Sánchez "Hold for relay." Macintosh IIfx / SunOS 4.1.4 From dito@netcom.com Wed Jan 24 15:24:36 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!netcom!dito From: dito@netcom.com (Dmitri Ito) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jan24.152436.8714@netcom.com> Date: Wed, 24 Jan 1996 15:24:36 GMT References: <1996Jan22.164636.6726@earthlink.net> <1996Jan23.003736.9641@kiae.su> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1996Jan23.003736.9641@kiae.su>, msanchez@kiae.su (Mike Sánchez) 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. -- Dmitri Ito Tape trading list upon request. SASE required for international mail. From rstewart@mit.edu Thu Jan 25 18:40:36 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mit!rstewart From: rstewart@mit.edu (Rodrigo Stewart) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jan25.184036.5559@mit.edu> Date: Thu, 25 Jan 1996 18:40:36 GMT References: <1996Jan22.164636.6726@earthlink.net> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Jan22.164636.6726@earthlink.net>, jkang@earthlink.net (Ji-woo Kang) writes: > How the 14 ASCII characters per node are encoded into the record groove. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Rodrigo Stewart SupraFAXModem 28.8 @ 19,200 bps "They will send a copy in my place."