From jramirez@utexas.edu Sat Jan 13 13:17:22 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!utexas!jramirez From: jramirez@utexas.edu (Jens Ramírez) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jan13.131722.2214@utexas.edu> Date: Sat, 13 Jan 1996 13:17:22 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. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- === Jens Ramírez === Dept of Electrical Engineering, University of Texas at Austin "The hatch is open. Is anyone listening?" From mmartinez@inria.fr Sun Jan 14 22:31:22 1996 Path: ashpoly!cascade!transat!ukc!fennimore!inria!mmartinez From: mmartinez@inria.fr (Marta Martínez) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jan14.223122.1778@inria.fr> Date: Sun, 14 Jan 1996 22:31:22 GMT References: <1996Jan13.131722.2214@utexas.edu> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Jan13.131722.2214@utexas.edu>, jramirez@utexas.edu (Jens Ramírez) writes: > How the 14 ASCII characters per node are encoded into the record groove. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Marta Martínez Opinions expressed are solely my own and not those of INRIA Rocquencourt. ------------------------------------------------------------ From kbrennan@kth.se Mon Jan 15 03:51:22 1996 Path: ashpoly!cascade!mxgate!coyoacan!kth!kbrennan From: kbrennan@kth.se (Katrin Brennan) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jan15.035122.2696@kth.se> Date: Mon, 15 Jan 1996 03:51:22 GMT References: <1996Jan13.131722.2214@utexas.edu> <1996Jan14.223122.1778@inria.fr> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Jan14.223122.1778@inria.fr>, mmartinez@inria.fr (Marta Martínez) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- === Katrin Brennan === Dept of Electrical Engineering, Royal Institute of Technology, Stockholm "5 sigma is a discovery. 7 is a question." From beriksson@cam.ac.uk Wed Jan 17 02:59:22 1996 Path: ashpoly!cascade!transat!ukc!fennimore!cam!beriksson From: beriksson@cam.ac.uk (Bill Eriksson) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jan17.025922.9254@cam.ac.uk> Date: Wed, 17 Jan 1996 02:59:22 GMT References: <1996Jan13.131722.2214@utexas.edu> <1996Jan14.223122.1778@inria.fr> <1996Jan15.035122.2696@kth.se> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Jan15.035122.2696@kth.se>, kbrennan@kth.se (Katrin Brennan) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Bill Eriksson *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0 From dsmirnov@stanford.edu Thu Jan 18 15:36:22 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!stanford!dsmirnov From: dsmirnov@stanford.edu (Diego Smirnov) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jan18.153622.9948@stanford.edu> Date: Thu, 18 Jan 1996 15:36:22 GMT References: <1996Jan13.131722.2214@utexas.edu> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Jan13.131722.2214@utexas.edu>, jramirez@utexas.edu (Jens Ramírez) writes: > How the 14 ASCII characters per node are encoded into the record groove. > Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Diego Smirnov "A soul is not exclusive to biology." Decstation 5000/200 / System 7.5.1