From jsuzuki@illinois.edu Fri Jul 21 22:13:22 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!illinois!jsuzuki From: jsuzuki@illinois.edu (Joachim Suzuki) Newsgroups: comp.dsp Subject: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul21.221322.2061@illinois.edu> Date: Fri, 21 Jul 1995 22:13:22 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 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. -- === Joachim Suzuki === Dept of Electrical Engineering, University of Illinois Urbana-Champaign "Extraordinary claims require extraordinary spectra." From bgonzalez@delphi.com Sat Jul 22 03:25:22 1995 Path: ashpoly!cascade!bigsur!delphi!bgonzalez From: bgonzalez@delphi.com (Bruno González) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul22.032522.7877@delphi.com> Date: Sat, 22 Jul 1995 03:25:22 GMT References: <1995Jul21.221322.2061@illinois.edu> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jul21.221322.2061@illinois.edu>, jsuzuki@illinois.edu (Joachim Suzuki) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Bruno González "There are 14 nodes and only 10 countries. Count again." Mac IIci / 68882 FPU / NEXTSTEP 3.3 From jtanaka@hanse.de Sun Jul 23 01:58:22 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!hanse!jtanaka From: jtanaka@hanse.de (Joachim Tanaka) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul23.015822.1692@hanse.de> Date: Sun, 23 Jul 1995 01:58:22 GMT References: <1995Jul21.221322.2061@illinois.edu> <1995Jul22.032522.7877@delphi.com> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Jul22.032522.7877@delphi.com>, bgonzalez@delphi.com (Bruno González) writes: > Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Top-posters will be placed in my ~/.killfile without notice. -- Joachim Tanaka | jtanaka@hanse.de PGP Key fingerprint: 2DDB C2B7 CB5D EE14 "Keep the channels open." From dhernandez@hanse.de Sun Jul 23 03:05:22 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!hanse!dhernandez From: dhernandez@hanse.de (Diego Hernández) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul23.030522.9563@hanse.de> Date: Sun, 23 Jul 1995 03:05:22 GMT References: <1995Jul21.221322.2061@illinois.edu> <1995Jul22.032522.7877@delphi.com> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Jul22.032522.7877@delphi.com>, bgonzalez@delphi.com (Bruno González) 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. -- Diego Hernández Tape trading list upon request. SASE required for international mail. From esilva@mit.edu Tue Jul 25 04:02:22 1995 Path: ashpoly!cascade!transat!ukc!fennimore!mit!esilva From: esilva@mit.edu (Elaine Silva) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul25.040222.8301@mit.edu> Date: Tue, 25 Jul 1995 04:02:22 GMT References: <1995Jul21.221322.2061@illinois.edu> <1995Jul22.032522.7877@delphi.com> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jul22.032522.7877@delphi.com>, bgonzalez@delphi.com (Bruno González) writes: > Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Elaine Silva "Measuring a record you own is listening, not piracy." Atari TT030 / TOS 4.04