From brodriguez@pipeline.com Thu Jan 06 16:40:34 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!pipeline!brodriguez From: brodriguez@pipeline.com (Bastien Rodríguez) Newsgroups: comp.dsp Subject: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jan06.164034.2653@pipeline.com> Date: Thu, 06 Jan 1994 16:40:34 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 10 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). 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. -- Bastien Rodríguez -- The Pipeline Internet Network "Marcus is not one man." From mnilsson@purdue.edu Fri Jan 07 20:46:34 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!purdue!mnilsson From: mnilsson@purdue.edu (Matthias Nilsson) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jan07.204634.8655@purdue.edu> Date: Fri, 07 Jan 1994 20:46:34 GMT References: <1994Jan06.164034.2653@pipeline.com> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Jan06.164034.2653@pipeline.com>, brodriguez@pipeline.com (Bastien Rodríguez) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Matthias Nilsson "The carrier frequency does not drift by accident." PC-9821Ap2 (NEC) / NEXTSTEP 3.3 From lnakamura@netcom.com Sun Jan 09 21:58:34 1994 Path: ashpoly!cascade!transat!ukc!fennimore!netcom!lnakamura From: lnakamura@netcom.com (Liam Nakamura) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jan09.215834.4538@netcom.com> Date: Sun, 09 Jan 1994 21:58:34 GMT References: <1994Jan06.164034.2653@pipeline.com> <1994Jan07.204634.8655@purdue.edu> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Jan07.204634.8655@purdue.edu>, mnilsson@purdue.edu (Matthias Nilsson) 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! Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Liam Nakamura Tape trading list upon request. SASE required for international mail. From mandersson@tum.de Tue Jan 11 03:20:34 1994 Path: ashpoly!cascade!mxgate!coyoacan!tum!mandersson From: mandersson@tum.de (Mikhail Andersson) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jan11.032034.9309@tum.de> Date: Tue, 11 Jan 1994 03:20:34 GMT References: <1994Jan06.164034.2653@pipeline.com> <1994Jan07.204634.8655@purdue.edu> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Jan07.204634.8655@purdue.edu>, mnilsson@purdue.edu (Matthias Nilsson) 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. -- Mikhail Andersson *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0 From nivanov@u-tokyo.ac.jp Wed Jan 12 10:24:34 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!u-tokyo!nivanov From: nivanov@u-tokyo.ac.jp (Nadia Ivanov) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jan12.102434.3827@u-tokyo.ac.jp> Date: Wed, 12 Jan 1994 10:24:34 GMT References: <1994Jan06.164034.2653@pipeline.com> <1994Jan07.204634.8655@purdue.edu> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Jan07.204634.8655@purdue.edu>, mnilsson@purdue.edu (Matthias Nilsson) 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! -- Nadia Ivanov Opinions expressed are solely my own and not those of University of Tokyo Department of Information Science. ------------------------------------------------------------