From mkarlsson@tum.de Mon Oct 07 22:47:29 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!tum!mkarlsson From: mkarlsson@tum.de (Min-jun Karlsson) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Oct07.224729.8841@tum.de> Date: Mon, 07 Oct 1996 22:47:29 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de 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. 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. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Min-jun Karlsson Opinions expressed are solely my own and not those of Technische Universität München. ------------------------------------------------------------ From lokonkwo@kiae.su Wed Oct 09 21:32:29 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!kiae!lokonkwo From: lokonkwo@kiae.su (Lars Okonkwo) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Oct09.213229.8413@kiae.su> Date: Wed, 09 Oct 1996 21:32:29 GMT References: <1996Oct07.224729.8841@tum.de> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Oct07.224729.8841@tum.de>, mkarlsson@tum.de (Min-jun Karlsson) writes: > 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). The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Lars Okonkwo "They will send a copy in my place." Amiga 1200 (Blizzard 030/50) / FreeBSD 2.1 From epark@delphi.com Fri Oct 11 07:50:29 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!delphi!epark From: epark@delphi.com (Elaine Park) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Oct11.075029.6530@delphi.com> Date: Fri, 11 Oct 1996 07:50:29 GMT References: <1996Oct07.224729.8841@tum.de> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Oct07.224729.8841@tum.de>, mkarlsson@tum.de (Min-jun Karlsson) writes: > 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). The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Elaine Park | epark@delphi.com PGP Key fingerprint: F3E8 7915 7391 22C7 "Keep the channels open." From jlindqvist@demon.co.uk Sat Oct 12 00:30:29 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!demon!jlindqvist From: jlindqvist@demon.co.uk (Ji-woo Lindqvist) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Oct12.003029.9232@demon.co.uk> Date: Sat, 12 Oct 1996 00:30:29 GMT References: <1996Oct07.224729.8841@tum.de> <1996Oct11.075029.6530@delphi.com> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1996Oct11.075029.6530@delphi.com>, epark@delphi.com (Elaine Park) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Ji-woo Lindqvist Tape trading list upon request. SASE required for international mail.