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1. [Propagation] Twilight? (score: 1): Author: Kelly Taylor <westbrookllc@yahoo.com>; Date: Thu, 25 Nov 2004 12:24:28 -0800 (PST); Im configuring Geoclock and some propagation software for CQWW contest and wanted to know which type of Twilight do hams use when predicting Grayline openings? Civil, Nautical, Astronomical? Or does; /archives//html/Propagation/2004-11/msg00070.html (7,178 bytes)
2. Re: [Propagation] Twilight? (score: 1): Author: "Thomas Giella KN4LF" <kn4lf@tampabay.rr.com>; Date: Thu, 25 Nov 2004 15:53:17 -0500; Kelly et all, Unfortunately the answer is not simple. The official definition of sunrise and sunset is when the Sun is 0.8 deg. below the horizon. Civil twilight is when the center of the Sun is 6 de; /archives//html/Propagation/2004-11/msg00071.html (9,803 bytes)

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