From kkarlsson@unam.mx Sat May 13 20:59:56 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!unam!kkarlsson From: kkarlsson@unam.mx (Karen Karlsson) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May13.205956.1035@unam.mx> Date: Sat, 13 May 1995 20:59:56 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 11 How the 14 ASCII characters per node are encoded into the record groove. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. 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. -- Karen Karlsson Hayes Optima 288 @ 9600 Telebit bps "A soul is not exclusive to biology." From mtanaka@cam.ac.uk Mon May 15 06:35:56 1995 Path: ashpoly!cascade!transat!ukc!fennimore!cam!mtanaka From: mtanaka@cam.ac.uk (Mathieu Tanaka) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May15.063556.6170@cam.ac.uk> Date: Mon, 15 May 1995 06:35:56 GMT References: <1995May13.205956.1035@unam.mx> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995May13.205956.1035@unam.mx>, kkarlsson@unam.mx (Karen Karlsson) 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. -- Mathieu Tanaka | mtanaka@cam.ac.uk PGP Key fingerprint: 2CF2 A06F A112 5299 "Keep the channels open." From lpetrov@berkeley.edu Wed May 17 03:06:56 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!berkeley!lpetrov From: lpetrov@berkeley.edu (Lisa Petrov) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May17.030656.3207@berkeley.edu> Date: Wed, 17 May 1995 03:06:56 GMT References: <1995May13.205956.1035@unam.mx> <1995May15.063556.6170@cam.ac.uk> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1995May15.063556.6170@cam.ac.uk>, mtanaka@cam.ac.uk (Mathieu Tanaka) writes: > Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Lisa Petrov *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0 From feriksson@mit.edu Wed May 17 05:51:56 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!mit!feriksson From: feriksson@mit.edu (Fiona Eriksson) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May17.055156.4666@mit.edu> Date: Wed, 17 May 1995 05:51:56 GMT References: <1995May13.205956.1035@unam.mx> <1995May15.063556.6170@cam.ac.uk> <1995May17.030656.3207@berkeley.edu> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995May17.030656.3207@berkeley.edu>, lpetrov@berkeley.edu (Lisa Petrov) 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. PGP Public key available via finger or upon request. -- Fiona Eriksson Hayes Optima 288 @ ISDN 64k bps "Row 14. No joke." From meriksson@uu.net Wed May 17 19:32:56 1995 Path: ashpoly!cascade!transat!ukc!fennimore!uu!meriksson From: meriksson@uu.net (Mateo Eriksson) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May17.193256.1074@uu.net> Date: Wed, 17 May 1995 19:32:56 GMT References: <1995May13.205956.1035@unam.mx> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995May13.205956.1035@unam.mx>, kkarlsson@unam.mx (Karen Karlsson) writes: > How the 14 ASCII characters per node are encoded into the record groove. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! PGP Public key available via finger or upon request. -- Mateo Eriksson *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0