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## [TRLog] The changing radius of Earth

 Subject: [TRLog] The changing radius of Earth W4EF@pacbell.net (Michael Tope) Fri, 10 Dec 1999 03:08:52 -0800
 ```Mark, I understand that there are still some flat-earthers out there. Tree has set up the program so they can set the earth radius to infinity by typing in RADIUS OF EARTH = 1/0. When operating in this configuration with the more modern rigs (FT1000MP, TS950, etc), horizon effects like skip zone, grayline, and MUF are totally eliminated. This is how many of the top ten operators are cheating fate. Change this parameter and you should see your scores improve dramatically. Mike, W4EF................ P.S. On a more serious note, I bet this effects the output of the grid square distance calculator used in contests like Stew Perry. ---------- From: Mark Beckwith[SMTP:swca@ionet.net] Sent: Thursday, December 09, 1999 8:52 PM To: trlog@contesting.com Subject: [TRLog] The changing radius of Earth >> Could someone explain the RADIUS OF EARTH command? Am I missing something? > >Some people (in Europe) like to use a standard value of this that might >be different than the default that I have put it. I put that there >so people could adjust it if necessary. It is used for the beam heading, >sunrise/sunset and distance between grid calculations. Okay, so this really is not a joke. Perhaps I am not equal to understanding that the radius of Earth is some kind of mystery or that it changes from contest to contest? This has really piqued my curiosity. Until now I assumed this dimension was for all intents and purposes, a constant. Perhaps there is disagreement because Earth is, in fact, not spherical, and the distance to the center is different depending on where on the Earth you are. I don't mean to go way out in right field here. Maybe I'll just quit while I am ahead (behind?). Sorry. This topic is probably better discussed on the Boring Amateur Radio Club reflector anyway. Mark, N5OT -- FAQ on WWW: http://www.contesting.com/trlogfaq.html Submissions: trlog@contesting.com Administrative requests: trlog-REQUEST@contesting.com Problems: owner-trlog@contesting.com Feature Wishlist: http://web.jzap.com/n6tr/trwish.html -- FAQ on WWW: http://www.contesting.com/trlogfaq.html Submissions: trlog@contesting.com Administrative requests: trlog-REQUEST@contesting.com Problems: owner-trlog@contesting.com Feature Wishlist: http://web.jzap.com/n6tr/trwish.html ```