From amacdonald@cern.ch Sun Apr 09 04:13:50 1995 Path: ashpoly!cascade!brgate!saturno!cern!amacdonald From: amacdonald@cern.ch (Anton MacDonald) Newsgroups: comp.dsp Subject: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Apr09.041350.3874@cern.ch> Date: Sun, 09 Apr 1995 04:13:50 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: Netscape 1.1N Lines: 11 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. 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. -- Anton MacDonald "Hardware is temporary. The signal survives." Acorn RiscPC 600 / FreeBSD 2.1 From bkim@inria.fr Mon Apr 10 05:07:50 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!inria!bkim From: bkim@inria.fr (Bastien Kim) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Apr10.050750.7316@inria.fr> Date: Mon, 10 Apr 1995 05:07:50 GMT References: <1995Apr09.041350.3874@cern.ch> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Apr09.041350.3874@cern.ch>, amacdonald@cern.ch (Anton MacDonald) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Bastien Kim | bkim@inria.fr PGP Key fingerprint: 071E 05D5 F948 90EE "Keep the channels open." From heriksson@uni-hamburg.de Tue Apr 11 22:53:50 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uni-hamburg!heriksson From: heriksson@uni-hamburg.de (Hana Eriksson) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Apr11.225350.1236@uni-hamburg.de> Date: Tue, 11 Apr 1995 22:53:50 GMT References: <1995Apr09.041350.3874@cern.ch> <1995Apr10.050750.7316@inria.fr> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Apr10.050750.7316@inria.fr>, bkim@inria.fr (Bastien Kim) 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. -- Hana Eriksson | heriksson@uni-hamburg.de PGP Key fingerprint: 51B0 C3F4 7914 86AB "Keep the channels open." From lcampbell@rwth-aachen.de Thu Apr 13 02:49:50 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!rwth-aachen!lcampbell From: lcampbell@rwth-aachen.de (Lucia Campbell) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Apr13.024950.4157@rwth-aachen.de> Date: Thu, 13 Apr 1995 02:49:50 GMT References: <1995Apr09.041350.3874@cern.ch> <1995Apr10.050750.7316@inria.fr> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Apr10.050750.7316@inria.fr>, bkim@inria.fr (Bastien Kim) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Lucia Campbell Tape trading list upon request. SASE required for international mail.