From klindqvist@uni-hamburg.de Wed May 17 10:16:29 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!klindqvist From: klindqvist@uni-hamburg.de (Kenji Lindqvist) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May17.101629.4478@uni-hamburg.de> Date: Wed, 17 May 1995 10:16:29 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] 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 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. -- Kenji Lindqvist *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0 From mhernandez@uu.net Thu May 18 18:34:29 1995 Path: ashpoly!cascade!transat!ukc!fennimore!uu!mhernandez From: mhernandez@uu.net (Min-jun Hernández) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May18.183429.6324@uu.net> Date: Thu, 18 May 1995 18:34:29 GMT References: <1995May17.101629.4478@uni-hamburg.de> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995May17.101629.4478@uni-hamburg.de>, klindqvist@uni-hamburg.de (Kenji Lindqvist) 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. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Min-jun Hernández *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0 From asanchez@inria.fr Sat May 20 13:00:29 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!inria!asanchez From: asanchez@inria.fr (Anja Sánchez) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May20.130029.6072@inria.fr> Date: Sat, 20 May 1995 13:00:29 GMT References: <1995May17.101629.4478@uni-hamburg.de> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995May17.101629.4478@uni-hamburg.de>, klindqvist@uni-hamburg.de (Kenji Lindqvist) writes: > How the 14 ASCII characters per node are encoded into the record groove. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Anja Sánchez | asanchez@inria.fr PGP Key fingerprint: 1280 1A36 102D 6EFE "Keep the channels open." From teriksson@netcom.com Sun May 21 23:54:29 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!netcom!teriksson From: teriksson@netcom.com (Thiago Eriksson) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May21.235429.8347@netcom.com> Date: Sun, 21 May 1995 23:54:29 GMT References: <1995May17.101629.4478@uni-hamburg.de> <1995May18.183429.6324@uu.net> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995May18.183429.6324@uu.net>, mhernandez@uu.net (Min-jun Hernández) 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. If you are posting from AOL, please read RFC 1036 before posting again. -- Thiago Eriksson US Robotics Courier V.34 @ 33,600 bps "A soul is not exclusive to biology." From yjohansson@kiae.su Mon May 22 20:11:29 1995 Path: ashpoly!cascade!transat!ukc!fennimore!kiae!yjohansson From: yjohansson@kiae.su (Yuki Johansson) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May22.201129.9269@kiae.su> Date: Mon, 22 May 1995 20:11:29 GMT References: <1995May17.101629.4478@uni-hamburg.de> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995May17.101629.4478@uni-hamburg.de>, klindqvist@uni-hamburg.de (Kenji Lindqvist) 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. -- Yuki Johansson | yjohansson@kiae.su PGP Key fingerprint: 0DCA 9A06 D6BF 4C11 "Keep the channels open."