- 1. Topband: sunrise (score: 1)
- Author: W7lr@aol.com
- Date: Sat, 21 Apr 2007 11:49:36 EDT
- I wonder how the weather man defines or determines sunrise time? If we lived in Hawaii it might be when the sun appears over the water horizon. Here in my MT qth we live at 1 mile elevation with near
- /archives//html/Topband/2007-04/msg00093.html (6,737 bytes)
- 2. Re: Topband: sunrise (score: 1)
- Author: Carl K9LA <k9la@gte.net>
- Date: Sat, 21 Apr 2007 19:07:59 -0400
- Bob, The official definition of sunrise is when the center of the sun is 0.8333 degrees below the horizon. Due to refraction in the atmosphere and the size of the sun, this puts the upper limb of the
- /archives//html/Topband/2007-04/msg00095.html (7,299 bytes)
- 3. Re: Topband: sunrise (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Sat, 21 Apr 2007 16:27:59 -0700
- Yes. It's all in these links. http://en.wikipedia.org/wiki/Twilight http://aa.usno.navy.mil/faq/docs/RST_defs.html 73, Jim K9YC _______________________________________________ Topband mailing list To
- /archives//html/Topband/2007-04/msg00096.html (7,092 bytes)
- 4. Re: Topband: sunrise (score: 1)
- Author: Carl K9LA <k9la@gte.net>
- Date: Sun, 22 Apr 2007 09:52:03 -0400
- There appears to be two issues with sunrise and propagation on the low bands. First, the signal enhancement around sunrise that W7LR mentioned is believed to be due to tilts in the E and F regions at
- /archives//html/Topband/2007-04/msg00098.html (7,575 bytes)
- 5. Re: Topband: sunrise (score: 1)
- Author: "Tom Rauch" <w8ji@contesting.com>
- Date: Sun, 22 Apr 2007 21:08:37 -0400
- Everyone should also keep in mind there often is no peak at all at sunrise. Many times the peak is at sunset on the eastern end of the path, sometimes it is in between sunrise on the east end of the
- /archives//html/Topband/2007-04/msg00103.html (7,526 bytes)
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