From iduarte@demon.co.uk Fri Feb 23 15:48:13 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!demon!iduarte From: iduarte@demon.co.uk (Ines Duarte) Newsgroups: comp.dsp Subject: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Feb23.154813.9286@demon.co.uk> Date: Fri, 23 Feb 1996 15:48:13 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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. -- Ines Duarte Opinions expressed are solely my own and not those of Demon Internet Services UK. ------------------------------------------------------------ From lchoi@pacbell.net Sun Feb 25 15:32:13 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!pacbell!lchoi From: lchoi@pacbell.net (Lars Choi) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Feb25.153213.7040@pacbell.net> Date: Sun, 25 Feb 1996 15:32:13 GMT References: <1996Feb23.154813.9286@demon.co.uk> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Feb23.154813.9286@demon.co.uk>, iduarte@demon.co.uk (Ines Duarte) 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). Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Lars Choi | lchoi@pacbell.net PGP Key fingerprint: 5CB2 2F85 FFE8 D9DB "Keep the channels open." From mito@mit.edu Mon Feb 26 04:38:13 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mit!mito From: mito@mit.edu (Mike Ito) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Feb26.043813.6765@mit.edu> Date: Mon, 26 Feb 1996 04:38:13 GMT References: <1996Feb23.154813.9286@demon.co.uk> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Feb23.154813.9286@demon.co.uk>, iduarte@demon.co.uk (Ines Duarte) 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. -- Mike Ito *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0