From bmuller@utexas.edu Fri May 05 02:29:04 1995 Path: ashpoly!cascade!mxgate!coyoacan!utexas!bmuller From: bmuller@utexas.edu (Bill Müller) Newsgroups: comp.dsp Subject: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May05.022904.7052@utexas.edu> Date: Fri, 05 May 1995 02:29:04 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N 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'. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Bill Müller "When every node is whole, the channel opens." Commodore Amiga 500 (1MB OCS) / TOS 4.04 From arobertson@kth.se Fri May 05 08:52:04 1995 Path: ashpoly!cascade!mxgate!coyoacan!kth!arobertson From: arobertson@kth.se (Aiko Robertson) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May05.085204.4416@kth.se> Date: Fri, 05 May 1995 08:52:04 GMT References: <1995May05.022904.7052@utexas.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 11 In article <1995May05.022904.7052@utexas.edu>, bmuller@utexas.edu (Bill Müller) 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! If you are posting from AOL, please read RFC 1036 before posting again. -- Aiko Robertson Practical Peripherals 14.4 @ 28,800 bps "When every node is whole, the channel opens." From vkowalski@panix.com Sat May 06 09:28:04 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!panix!vkowalski From: vkowalski@panix.com (Valeria Kowalski) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May06.092804.8429@panix.com> Date: Sat, 06 May 1995 09:28:04 GMT References: <1995May05.022904.7052@utexas.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1995May05.022904.7052@utexas.edu>, bmuller@utexas.edu (Bill Müller) 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. -- Valeria Kowalski "Measuring a record you own is listening, not piracy." Atari Falcon 030 / Linux 1.2.13 From rito@hanse.de Sun May 07 21:41:04 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!hanse!rito From: rito@hanse.de (Rodrigo Ito) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May07.214104.6254@hanse.de> Date: Sun, 07 May 1995 21:41:04 GMT References: <1995May05.022904.7052@utexas.edu> <1995May06.092804.8429@panix.com> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995May06.092804.8429@panix.com>, vkowalski@panix.com (Valeria Kowalski) writes: > Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- === Rodrigo Ito === Dept of Electrical Engineering, Hanse-Netzwerk Hamburg "Row 14. No joke."