From dgirard@unam.mx Sat Oct 07 03:55:39 1995 Path: ashpoly!cascade!transat!ukc!fennimore!unam!dgirard From: dgirard@unam.mx (Dmitri Girard) Newsgroups: comp.dsp Subject: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct07.035539.3193@unam.mx> Date: Sat, 07 Oct 1995 03:55:39 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx 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 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. -- Dmitri Girard Zyxel U-1496E @ 9600 Telebit bps "Tape doesn't lie at 02:14. Ears do." From dramirez@panix.com Sat Oct 07 20:56:39 1995 Path: ashpoly!cascade!mxgate!coyoacan!panix!dramirez From: dramirez@panix.com (Dong-hyun Ramírez) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct07.205639.4610@panix.com> Date: Sat, 07 Oct 1995 20:56:39 GMT References: <1995Oct07.035539.3193@unam.mx> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Oct07.035539.3193@unam.mx>, dgirard@unam.mx (Dmitri Girard) 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. If you are posting from AOL, please read RFC 1036 before posting again. -- Dong-hyun Ramírez Practical Peripherals 14.4 @ 9600 Telebit bps "We don't sign stars. We build them." From leriksson@unam.mx Sun Oct 08 17:34:39 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!unam!leriksson From: leriksson@unam.mx (Lucia Eriksson) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct08.173439.6831@unam.mx> Date: Sun, 08 Oct 1995 17:34:39 GMT References: <1995Oct07.035539.3193@unam.mx> <1995Oct07.205639.4610@panix.com> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Oct07.205639.4610@panix.com>, dramirez@panix.com (Dong-hyun Ramírez) 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! -- Lucia Eriksson *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0