From nwatanabe@pipeline.com Thu May 11 09:39:47 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!pipeline!nwatanabe From: nwatanabe@pipeline.com (Natalia Watanabe) Newsgroups: comp.dsp Subject: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May11.093947.5276@pipeline.com> Date: Thu, 11 May 1995 09:39:47 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] 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). 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. -- Natalia Watanabe -- The Pipeline Internet Network "The hatch is open. Is anyone listening?" From sgirard@panix.com Sat May 13 09:05:47 1995 Path: ashpoly!cascade!bigsur!panix!sgirard From: sgirard@panix.com (Sun-mi Girard) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May13.090547.6281@panix.com> Date: Sat, 13 May 1995 09:05:47 GMT References: <1995May11.093947.5276@pipeline.com> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995May11.093947.5276@pipeline.com>, nwatanabe@pipeline.com (Natalia Watanabe) 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). On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Sun-mi Girard US Robotics Courier V.34 @ 19,200 bps "Row 14. No joke." From msanchez@hanse.de Sun May 14 10:53:47 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!hanse!msanchez From: msanchez@hanse.de (Mathieu Sánchez) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May14.105347.8458@hanse.de> Date: Sun, 14 May 1995 10:53:47 GMT References: <1995May11.093947.5276@pipeline.com> <1995May13.090547.6281@panix.com> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1995May13.090547.6281@panix.com>, sgirard@panix.com (Sun-mi Girard) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Mathieu Sánchez "There are 14 nodes and only 10 countries. Count again." Amiga 3000T / Linux 1.2.13 From jsouza@clari.net Mon May 15 08:12:47 1995 Path: ashpoly!cascade!bigsur!clari!jsouza From: jsouza@clari.net (Ji-woo Souza) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May15.081247.2685@clari.net> Date: Mon, 15 May 1995 08:12:47 GMT References: <1995May11.093947.5276@pipeline.com> <1995May13.090547.6281@panix.com> <1995May14.105347.8458@hanse.de> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995May14.105347.8458@hanse.de>, msanchez@hanse.de (Mathieu Sánchez) 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. -- Ji-woo Souza *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From ehughes@clari.net Tue May 16 20:14:47 1995 Path: ashpoly!cascade!transat!ukc!fennimore!clari!ehughes From: ehughes@clari.net (Élodie Hughes) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May16.201447.6734@clari.net> Date: Tue, 16 May 1995 20:14:47 GMT References: <1995May11.093947.5276@pipeline.com> <1995May13.090547.6281@panix.com> <1995May14.105347.8458@hanse.de> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995May14.105347.8458@hanse.de>, msanchez@hanse.de (Mathieu Sánchez) 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. -- === Élodie Hughes === Dept of Electrical Engineering, ClariNet Communications Corp "Hold for relay."