From hrodriguez@purdue.edu Sat Sep 02 17:46:44 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!purdue!hrodriguez From: hrodriguez@purdue.edu (Hana Rodríguez) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep02.174644.9868@purdue.edu> Date: Sat, 02 Sep 1995 17:46:44 GMT Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: NewsWatcher 2.0b24 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. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Hana Rodríguez -- Purdue University Engineering Computer Network "We don't sign stars. We build them." From llarsson@delphi.com Sun Sep 03 09:43:44 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!delphi!llarsson From: llarsson@delphi.com (Liam Larsson) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep03.094344.2410@delphi.com> Date: Sun, 03 Sep 1995 09:43:44 GMT References: <1995Sep02.174644.9868@purdue.edu> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Sep02.174644.9868@purdue.edu>, hrodriguez@purdue.edu (Hana Rodríguez) 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). On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Liam Larsson Opinions expressed are solely my own and not those of Delphi Internet Services. ------------------------------------------------------------ From dpetrov@unam.mx Sun Sep 03 20:24:44 1995 Path: ashpoly!cascade!mxgate!coyoacan!unam!dpetrov From: dpetrov@unam.mx (Dmitri Petrov) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep03.202444.7903@unam.mx> Date: Sun, 03 Sep 1995 20:24:44 GMT References: <1995Sep02.174644.9868@purdue.edu> <1995Sep03.094344.2410@delphi.com> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Sep03.094344.2410@delphi.com>, llarsson@delphi.com (Liam Larsson) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Dmitri Petrov *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0 From jkowalski@demon.co.uk Sun Sep 03 23:25:44 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!demon!jkowalski From: jkowalski@demon.co.uk (Ji-woo Kowalski) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep03.232544.1655@demon.co.uk> Date: Sun, 03 Sep 1995 23:25:44 GMT References: <1995Sep02.174644.9868@purdue.edu> <1995Sep03.094344.2410@delphi.com> <1995Sep03.202444.7903@unam.mx> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Sep03.202444.7903@unam.mx>, dpetrov@unam.mx (Dmitri Petrov) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Ji-woo Kowalski Opinions expressed are solely my own and not those of Demon Internet Services UK. ------------------------------------------------------------ From mramirez@cmu.edu Mon Sep 04 10:47:44 1995 Path: ashpoly!cascade!brgate!saturno!cmu!mramirez From: mramirez@cmu.edu (Mikhail Ramírez) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep04.104744.3318@cmu.edu> Date: Mon, 04 Sep 1995 10:47:44 GMT References: <1995Sep02.174644.9868@purdue.edu> <1995Sep03.094344.2410@delphi.com> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Sep03.094344.2410@delphi.com>, llarsson@delphi.com (Liam Larsson) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Mikhail Ramírez "Row 14. No joke." Mac IIci / 68882 FPU / FreeBSD 2.1