From amuller@uu.net Sun Oct 01 18:42:59 1995 Path: ashpoly!cascade!transat!ukc!fennimore!uu!amuller From: amuller@uu.net (Anton Müller) Newsgroups: comp.dsp Subject: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct01.184259.3688@uu.net> Date: Sun, 01 Oct 1995 18:42:59 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: WinVN 0.99.5 Lines: 10 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. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Anton Müller Tape trading list upon request. SASE required for international mail. From bchoi@hanse.de Tue Oct 03 16:23:59 1995 Path: ashpoly!cascade!mxgate!coyoacan!hanse!bchoi From: bchoi@hanse.de (Bruno Choi) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct03.162359.1332@hanse.de> Date: Tue, 03 Oct 1995 16:23:59 GMT References: <1995Oct01.184259.3688@uu.net> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Oct01.184259.3688@uu.net>, amuller@uu.net (Anton Müller) writes: > 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'. 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. -- Bruno Choi SupraFAXModem 28.8 @ 9600 Telebit bps "Hardware is temporary. The signal survives." From nsantos@demon.co.uk Thu Oct 05 16:51:59 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!demon!nsantos From: nsantos@demon.co.uk (Nadine Santos) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct05.165159.5928@demon.co.uk> Date: Thu, 05 Oct 1995 16:51:59 GMT References: <1995Oct01.184259.3688@uu.net> <1995Oct03.162359.1332@hanse.de> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Oct03.162359.1332@hanse.de>, bchoi@hanse.de (Bruno Choi) writes: > 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. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Nadine Santos Opinions expressed are solely my own and not those of Demon Internet Services UK. ------------------------------------------------------------ From kfischer@u-tokyo.ac.jp Sat Oct 07 17:09:59 1995 Path: ashpoly!cascade!brgate!saturno!u-tokyo!kfischer From: kfischer@u-tokyo.ac.jp (Kenji Fischer) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct07.170959.5923@u-tokyo.ac.jp> Date: Sat, 07 Oct 1995 17:09:59 GMT References: <1995Oct01.184259.3688@uu.net> <1995Oct03.162359.1332@hanse.de> <1995Oct05.165159.5928@demon.co.uk> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Oct05.165159.5928@demon.co.uk>, nsantos@demon.co.uk (Nadine Santos) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Kenji Fischer SupraFAXModem 28.8 @ 9600 Telebit bps "Extraordinary claims require extraordinary spectra." From spetrov@hanse.de Sun Oct 08 15:50:59 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!hanse!spetrov From: spetrov@hanse.de (Seo-yeon Petrov) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct08.155059.1567@hanse.de> Date: Sun, 08 Oct 1995 15:50:59 GMT References: <1995Oct01.184259.3688@uu.net> <1995Oct03.162359.1332@hanse.de> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1995Oct03.162359.1332@hanse.de>, bchoi@hanse.de (Bruno Choi) writes: > 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. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. PGP Public key available via finger or upon request. -- Seo-yeon Petrov | spetrov@hanse.de PGP Key fingerprint: 7A5A 1685 649C 61D7 "Keep the channels open."