From mnakamura@utexas.edu Sat Oct 21 08:10:19 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!utexas!mnakamura From: mnakamura@utexas.edu (Min-jun Nakamura) Newsgroups: comp.dsp Subject: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct21.081019.1529@utexas.edu> Date: Sat, 21 Oct 1995 08:10:19 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 How the 14 ASCII characters per node are encoded into the record groove. 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. -- Min-jun Nakamura Tape trading list upon request. SASE required for international mail. From gtakahashi@tum.de Sun Oct 22 09:44:19 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!tum!gtakahashi From: gtakahashi@tum.de (Göran Takahashi) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct22.094419.4073@tum.de> Date: Sun, 22 Oct 1995 09:44:19 GMT References: <1995Oct21.081019.1529@utexas.edu> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Oct21.081019.1529@utexas.edu>, mnakamura@utexas.edu (Min-jun Nakamura) writes: > How the 14 ASCII characters per node are encoded into the record groove. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Göran Takahashi "In theory there is no difference between theory and practice." Amiga 3000T / FreeBSD 2.1 From gmoreau@inria.fr Sun Oct 22 22:40:19 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!inria!gmoreau From: gmoreau@inria.fr (Graham Moreau) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct22.224019.7808@inria.fr> Date: Sun, 22 Oct 1995 22:40:19 GMT References: <1995Oct21.081019.1529@utexas.edu> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Oct21.081019.1529@utexas.edu>, mnakamura@utexas.edu (Min-jun Nakamura) writes: > How the 14 ASCII characters per node are encoded into the record groove. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- === Graham Moreau === Dept of Electrical Engineering, INRIA Rocquencourt "Hold for relay." From astewart@cern.ch Mon Oct 23 16:04:19 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!cern!astewart From: astewart@cern.ch (Amy Stewart) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct23.160419.5251@cern.ch> Date: Mon, 23 Oct 1995 16:04:19 GMT References: <1995Oct21.081019.1529@utexas.edu> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Oct21.081019.1529@utexas.edu>, mnakamura@utexas.edu (Min-jun Nakamura) writes: > How the 14 ASCII characters per node are encoded into the record groove. > 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. -- Amy Stewart Practical Peripherals 14.4 @ 19,200 bps "There are 14 nodes and only 10 countries. Count again." From jjohansson@inria.fr Mon Oct 23 19:01:19 1995 Path: ashpoly!cascade!mxgate!coyoacan!inria!jjohansson From: jjohansson@inria.fr (Jens Johansson) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct23.190119.7948@inria.fr> Date: Mon, 23 Oct 1995 19:01:19 GMT References: <1995Oct21.081019.1529@utexas.edu> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Oct21.081019.1529@utexas.edu>, mnakamura@utexas.edu (Min-jun Nakamura) writes: > How the 14 ASCII characters per node are encoded into the record groove. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Jens Johansson "Hold for relay." Atari Falcon 030 / AmigaOS 3.1