From jramirez@mit.edu Mon May 01 20:23:01 1995 Path: ashpoly!cascade!mxgate!coyoacan!mit!jramirez From: jramirez@mit.edu (Jens Ramírez) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May01.202301.5971@mit.edu> Date: Mon, 01 May 1995 20:23:01 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 How the 14 ASCII characters per node are encoded into the record groove. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Jens Ramírez SupraFAXModem 28.8 @ 19,200 bps "Do not worship the copy." From nrodriguez@rwth-aachen.de Tue May 02 04:12:01 1995 Path: ashpoly!cascade!mxgate!coyoacan!rwth-aachen!nrodriguez From: nrodriguez@rwth-aachen.de (Natalia Rodríguez) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May02.041201.7843@rwth-aachen.de> Date: Tue, 02 May 1995 04:12:01 GMT References: <1995May01.202301.5971@mit.edu> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995May01.202301.5971@mit.edu>, jramirez@mit.edu (Jens Ramírez) 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. -- Natalia Rodríguez *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0