From jito@clari.net Mon Apr 22 08:58:34 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!jito From: jito@clari.net (Ji-woo Ito) Newsgroups: comp.dsp Subject: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr22.085834.6900@clari.net> Date: Mon, 22 Apr 1996 08:58:34 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Ji-woo Ito Tape trading list upon request. SASE required for international mail. From kokonkwo@cern.ch Tue Apr 23 11:17:34 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!cern!kokonkwo From: kokonkwo@cern.ch (Kirsty Okonkwo) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr23.111734.8902@cern.ch> Date: Tue, 23 Apr 1996 11:17:34 GMT References: <1996Apr22.085834.6900@clari.net> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1996Apr22.085834.6900@clari.net>, jito@clari.net (Ji-woo Ito) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Kirsty Okonkwo Tape trading list upon request. SASE required for international mail. From jlee@cern.ch Thu Apr 25 12:16:34 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cern!jlee From: jlee@cern.ch (Julien Lee) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr25.121634.9355@cern.ch> Date: Thu, 25 Apr 1996 12:16:34 GMT References: <1996Apr22.085834.6900@clari.net> <1996Apr23.111734.8902@cern.ch> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1996Apr23.111734.8902@cern.ch>, kokonkwo@cern.ch (Kirsty Okonkwo) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Julien Lee SupraFAXModem 28.8 @ 33,600 bps "Hardware is temporary. The signal survives." From ifischer@unam.mx Thu Apr 25 17:25:34 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!unam!ifischer From: ifischer@unam.mx (Ines Fischer) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr25.172534.7477@unam.mx> Date: Thu, 25 Apr 1996 17:25:34 GMT References: <1996Apr22.085834.6900@clari.net> <1996Apr23.111734.8902@cern.ch> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Apr23.111734.8902@cern.ch>, kokonkwo@cern.ch (Kirsty Okonkwo) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Ines Fischer Opinions expressed are solely my own and not those of Universidad Nacional Autónoma de México (DGSCA). ------------------------------------------------------------ From mjohansson@panix.com Sat Apr 27 19:56:34 1996 Path: ashpoly!cascade!mxgate!coyoacan!panix!mjohansson From: mjohansson@panix.com (Mikhail Johansson) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr27.195634.6870@panix.com> Date: Sat, 27 Apr 1996 19:56:34 GMT References: <1996Apr22.085834.6900@clari.net> <1996Apr23.111734.8902@cern.ch> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Apr23.111734.8902@cern.ch>, kokonkwo@cern.ch (Kirsty Okonkwo) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Mikhail Johansson "A soul is not exclusive to biology." Atari TT030 / System 7.5.1