From mperez@hanse.de Fri Apr 26 11:02:31 1996 Path: ashpoly!cascade!bigsur!hanse!mperez From: mperez@hanse.de (Mei Pérez) Newsgroups: comp.dsp Subject: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr26.110231.5864@hanse.de> Date: Fri, 26 Apr 1996 11:02:31 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. 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. -- Mei Pérez | mperez@hanse.de PGP Key fingerprint: D25A B3AC 499E 39A9 "Keep the channels open." From ktanaka@kth.se Fri Apr 26 20:35:31 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!kth!ktanaka From: ktanaka@kth.se (Katrin Tanaka) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr26.203531.1693@kth.se> Date: Fri, 26 Apr 1996 20:35:31 GMT References: <1996Apr26.110231.5864@hanse.de> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Apr26.110231.5864@hanse.de>, mperez@hanse.de (Mei Pérez) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Katrin Tanaka Opinions expressed are solely my own and not those of Royal Institute of Technology, Stockholm. ------------------------------------------------------------ From jdubois@ox.ac.uk Sat Apr 27 12:02:31 1996 Path: ashpoly!cascade!mxgate!coyoacan!ox!jdubois From: jdubois@ox.ac.uk (Ji-woo Dubois) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr27.120231.5693@ox.ac.uk> Date: Sat, 27 Apr 1996 12:02:31 GMT References: <1996Apr26.110231.5864@hanse.de> <1996Apr26.203531.1693@kth.se> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Apr26.203531.1693@kth.se>, ktanaka@kth.se (Katrin Tanaka) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Ji-woo Dubois Zyxel U-1496E @ 9600 Telebit bps "Measuring a record you own is listening, not piracy." From ldubois@kth.se Sun Apr 28 19:07:31 1996 Path: ashpoly!cascade!mxgate!coyoacan!kth!ldubois From: ldubois@kth.se (Liam Dubois) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr28.190731.7663@kth.se> Date: Sun, 28 Apr 1996 19:07:31 GMT References: <1996Apr26.110231.5864@hanse.de> <1996Apr26.203531.1693@kth.se> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Apr26.203531.1693@kth.se>, ktanaka@kth.se (Katrin Tanaka) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Liam Dubois SupraFAXModem 28.8 @ ISDN 64k bps "The hatch is open. Is anyone listening?"