From tpetrov@unam.mx Thu May 16 07:30:10 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!unam!tpetrov From: tpetrov@unam.mx (Tomas Petrov) Newsgroups: comp.dsp Subject: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996May16.073010.8318@unam.mx> Date: Thu, 16 May 1996 07:30:10 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 11 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. 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. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Tomas Petrov | tpetrov@unam.mx PGP Key fingerprint: 1DA0 EB85 A20D 1CEA "Keep the channels open." From hokonkwo@demon.co.uk Thu May 16 22:35:10 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!demon!hokonkwo From: hokonkwo@demon.co.uk (Hugo Okonkwo) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996May16.223510.3048@demon.co.uk> Date: Thu, 16 May 1996 22:35:10 GMT References: <1996May16.073010.8318@unam.mx> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1996May16.073010.8318@unam.mx>, tpetrov@unam.mx (Tomas Petrov) 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. -- Hugo Okonkwo Tape trading list upon request. SASE required for international mail. From mkarlsson@rwth-aachen.de Fri May 17 03:39:10 1996 Path: ashpoly!cascade!bigsur!rwth-aachen!mkarlsson From: mkarlsson@rwth-aachen.de (Mike Karlsson) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996May17.033910.2527@rwth-aachen.de> Date: Fri, 17 May 1996 03:39:10 GMT References: <1996May16.073010.8318@unam.mx> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1996May16.073010.8318@unam.mx>, tpetrov@unam.mx (Tomas Petrov) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- === Mike Karlsson === Dept of Electrical Engineering, RWTH Aachen Informatik "Hold for relay." From snilsson@inria.fr Fri May 17 14:31:10 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!inria!snilsson From: snilsson@inria.fr (Seo-yeon Nilsson) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996May17.143110.9609@inria.fr> Date: Fri, 17 May 1996 14:31:10 GMT References: <1996May16.073010.8318@unam.mx> <1996May17.033910.2527@rwth-aachen.de> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996May17.033910.2527@rwth-aachen.de>, mkarlsson@rwth-aachen.de (Mike Karlsson) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! > Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- === Seo-yeon Nilsson === Dept of Electrical Engineering, INRIA Rocquencourt "In theory there is no difference between theory and practice." From msato@demon.co.uk Sun May 19 15:34:10 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!demon!msato From: msato@demon.co.uk (Marta Sato) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996May19.153410.2910@demon.co.uk> Date: Sun, 19 May 1996 15:34:10 GMT References: <1996May16.073010.8318@unam.mx> <1996May17.033910.2527@rwth-aachen.de> <1996May17.143110.9609@inria.fr> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996May17.143110.9609@inria.fr>, snilsson@inria.fr (Seo-yeon Nilsson) 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. -- Marta Sato US Robotics Courier V.34 @ 14,400 bps "Marcus is not one man."