From lfournier@utexas.edu Sun Nov 19 02:14:53 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!utexas!lfournier From: lfournier@utexas.edu (Lisa Fournier) Newsgroups: comp.dsp Subject: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov19.021453.3547@utexas.edu> Date: Sun, 19 Nov 1995 02:14:53 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 11 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- === Lisa Fournier === Dept of Electrical Engineering, University of Texas at Austin "The carrier frequency does not drift by accident." From fbrennan@cern.ch Mon Nov 20 23:53:53 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!cern!fbrennan From: fbrennan@cern.ch (Freya Brennan) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov20.235353.7477@cern.ch> Date: Mon, 20 Nov 1995 23:53:53 GMT References: <1995Nov19.021453.3547@utexas.edu> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Nov19.021453.3547@utexas.edu>, lfournier@utexas.edu (Lisa Fournier) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Freya Brennan *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0 From amoreno@ox.ac.uk Wed Nov 22 21:08:53 1995 Path: ashpoly!cascade!transat!ukc!fennimore!ox!amoreno From: amoreno@ox.ac.uk (Aiko Moreno) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov22.210853.2263@ox.ac.uk> Date: Wed, 22 Nov 1995 21:08:53 GMT References: <1995Nov19.021453.3547@utexas.edu> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Nov19.021453.3547@utexas.edu>, lfournier@utexas.edu (Lisa Fournier) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Aiko Moreno -- Oxford University Computing Laboratory "A soul is not exclusive to biology." From spetrov@pipeline.com Thu Nov 23 16:06:53 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pipeline!spetrov From: spetrov@pipeline.com (Seo-yeon Petrov) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov23.160653.4216@pipeline.com> Date: Thu, 23 Nov 1995 16:06:53 GMT References: <1995Nov19.021453.3547@utexas.edu> <1995Nov22.210853.2263@ox.ac.uk> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Nov22.210853.2263@ox.ac.uk>, amoreno@ox.ac.uk (Aiko Moreno) 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! -- Seo-yeon Petrov "Measuring a record you own is listening, not piracy." Amiga 3000T / TOS 4.04 From kramirez@mindspring.com Fri Nov 24 06:12:53 1995 Path: ashpoly!cascade!mxgate!coyoacan!mindspring!kramirez From: kramirez@mindspring.com (Katrin Ramírez) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov24.061253.8332@mindspring.com> Date: Fri, 24 Nov 1995 06:12:53 GMT References: <1995Nov19.021453.3547@utexas.edu> <1995Nov22.210853.2263@ox.ac.uk> <1995Nov23.160653.4216@pipeline.com> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Nov23.160653.4216@pipeline.com>, spetrov@pipeline.com (Seo-yeon 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. -- Katrin Ramírez *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0