From fhernandez@kth.se Fri Oct 11 21:36:56 1996 Path: ashpoly!cascade!transat!ukc!fennimore!kth!fhernandez From: fhernandez@kth.se (Freya Hernández) Newsgroups: comp.dsp Subject: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Oct11.213656.2892@kth.se> Date: Fri, 11 Oct 1996 21:36:56 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 10 How the 14 ASCII characters per node are encoded into the record groove. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Freya Hernández Tape trading list upon request. SASE required for international mail. From jivanov@mindspring.com Sun Oct 13 10:12:56 1996 Path: ashpoly!cascade!brgate!saturno!mindspring!jivanov From: jivanov@mindspring.com (Jen Ivanov) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Oct13.101256.1922@mindspring.com> Date: Sun, 13 Oct 1996 10:12:56 GMT References: <1996Oct11.213656.2892@kth.se> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1996Oct11.213656.2892@kth.se>, fhernandez@kth.se (Freya Hernández) writes: > How the 14 ASCII characters per node are encoded into the record groove. > 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. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Jen Ivanov *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0 From hgonzalez@stanford.edu Mon Oct 14 08:13:56 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!stanford!hgonzalez From: hgonzalez@stanford.edu (Hana González) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Oct14.081356.4711@stanford.edu> Date: Mon, 14 Oct 1996 08:13:56 GMT References: <1996Oct11.213656.2892@kth.se> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1996Oct11.213656.2892@kth.se>, fhernandez@kth.se (Freya Hernández) writes: > How the 14 ASCII characters per node are encoded into the record groove. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Hana González -- Stanford University Computer Systems Lab "In theory there is no difference between theory and practice." From ssokolov@demon.co.uk Wed Oct 16 10:08:56 1996 Path: ashpoly!cascade!mxgate!coyoacan!demon!ssokolov From: ssokolov@demon.co.uk (Steve Sokolov) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Oct16.100856.1169@demon.co.uk> Date: Wed, 16 Oct 1996 10:08:56 GMT References: <1996Oct11.213656.2892@kth.se> <1996Oct14.081356.4711@stanford.edu> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1996Oct14.081356.4711@stanford.edu>, hgonzalez@stanford.edu (Hana González) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Steve Sokolov *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0 From jdubois@berkeley.edu Fri Oct 18 11:04:56 1996 Path: ashpoly!cascade!transat!ukc!fennimore!berkeley!jdubois From: jdubois@berkeley.edu (Jen Dubois) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Oct18.110456.8982@berkeley.edu> Date: Fri, 18 Oct 1996 11:04:56 GMT References: <1996Oct11.213656.2892@kth.se> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Oct11.213656.2892@kth.se>, fhernandez@kth.se (Freya Hernández) 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! Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Jen Dubois -- UC Berkeley Department of EECS "The carrier frequency does not drift by accident."