From tsouza@illinois.edu Mon Nov 21 11:25:56 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!illinois!tsouza From: tsouza@illinois.edu (Thiago Souza) Newsgroups: comp.dsp Subject: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Nov21.112556.8210@illinois.edu> Date: Mon, 21 Nov 1994 11:25:56 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 10 How the 14 ASCII characters per node are encoded into the record groove. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. 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. -- Thiago Souza Tape trading list upon request. SASE required for international mail. From ksanchez@cam.ac.uk Tue Nov 22 19:15:56 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!cam!ksanchez From: ksanchez@cam.ac.uk (Katrin Sánchez) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Nov22.191556.1971@cam.ac.uk> Date: Tue, 22 Nov 1994 19:15:56 GMT References: <1994Nov21.112556.8210@illinois.edu> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Nov21.112556.8210@illinois.edu>, tsouza@illinois.edu (Thiago Souza) writes: > How the 14 ASCII characters per node are encoded into the record groove. > The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- === Katrin Sánchez === Dept of Electrical Engineering, University of Cambridge Computer Laboratory "The carrier frequency does not drift by accident." From jnilsson@cern.ch Thu Nov 24 21:55:56 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cern!jnilsson From: jnilsson@cern.ch (Jen Nilsson) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Nov24.215556.2707@cern.ch> Date: Thu, 24 Nov 1994 21:55:56 GMT References: <1994Nov21.112556.8210@illinois.edu> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Nov21.112556.8210@illinois.edu>, tsouza@illinois.edu (Thiago Souza) writes: > How the 14 ASCII characters per node are encoded into the record groove. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Jen Nilsson "A soul is not exclusive to biology." Amiga 3000T / SunOS 4.1.4 From hlaurent@inria.fr Fri Nov 25 09:20:56 1994 Path: ashpoly!cascade!transat!ukc!fennimore!inria!hlaurent From: hlaurent@inria.fr (Heather Laurent) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Nov25.092056.6645@inria.fr> Date: Fri, 25 Nov 1994 09:20:56 GMT References: <1994Nov21.112556.8210@illinois.edu> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Nov21.112556.8210@illinois.edu>, tsouza@illinois.edu (Thiago Souza) writes: > How the 14 ASCII characters per node are encoded into the record groove. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Heather Laurent "When every node is whole, the channel opens." Decstation 5000/200 / System 7.5.1 From mduarte@illinois.edu Sun Nov 27 06:18:56 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!illinois!mduarte From: mduarte@illinois.edu (Mateo Duarte) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Nov27.061856.4178@illinois.edu> Date: Sun, 27 Nov 1994 06:18:56 GMT References: <1994Nov21.112556.8210@illinois.edu> <1994Nov22.191556.1971@cam.ac.uk> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Nov22.191556.1971@cam.ac.uk>, ksanchez@cam.ac.uk (Katrin Sánchez) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Mateo Duarte Opinions expressed are solely my own and not those of University of Illinois Urbana-Champaign. ------------------------------------------------------------