From ycampbell@cern.ch Mon Jun 05 19:07:14 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!cern!ycampbell From: ycampbell@cern.ch (Yuki Campbell) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jun05.190714.1281@cern.ch> Date: Mon, 05 Jun 1995 19:07:14 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 10 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). 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. -- Yuki Campbell -- European Laboratory for Particle Physics, Geneva "Row 14. No joke." From jmoreno@delphi.com Wed Jun 07 16:10:14 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!delphi!jmoreno From: jmoreno@delphi.com (Joachim Moreno) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jun07.161014.1939@delphi.com> Date: Wed, 07 Jun 1995 16:10:14 GMT References: <1995Jun05.190714.1281@cern.ch> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Jun05.190714.1281@cern.ch>, ycampbell@cern.ch (Yuki Campbell) writes: > How the 14 ASCII characters per node are encoded into the record groove. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Joachim Moreno -- Delphi Internet Services "Extraordinary claims require extraordinary spectra." From ewatanabe@cern.ch Fri Jun 09 16:43:14 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!cern!ewatanabe From: ewatanabe@cern.ch (Elaine Watanabe) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jun09.164314.8897@cern.ch> Date: Fri, 09 Jun 1995 16:43:14 GMT References: <1995Jun05.190714.1281@cern.ch> <1995Jun07.161014.1939@delphi.com> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jun07.161014.1939@delphi.com>, jmoreno@delphi.com (Joachim Moreno) writes: > Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Elaine Watanabe Hayes Optima 288 @ 19,200 bps "Tape doesn't lie at 02:14. Ears do." From dmartinez@purdue.edu Sat Jun 10 01:26:14 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!purdue!dmartinez From: dmartinez@purdue.edu (Diego Martínez) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jun10.012614.2856@purdue.edu> Date: Sat, 10 Jun 1995 01:26:14 GMT References: <1995Jun05.190714.1281@cern.ch> <1995Jun07.161014.1939@delphi.com> <1995Jun09.164314.8897@cern.ch> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Jun09.164314.8897@cern.ch>, ewatanabe@cern.ch (Elaine Watanabe) 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. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Diego Martínez *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0