Hi Chaps - I saw the discussion on the modes and losses and wanted to add a bit - When looking at WWVB 60Khz (close to 74?) contours for daytime I notice more of a Vertical peanut shape in the fiedls
Laurence; It would be easy to determine coverage of radio signals of longer wavelengths using the soil map. However, the "soil map" is only an estimate and changes DRASTICALLY from season to season.
Jay; The only actual way to determine if it's field strength is of course to take field strength measurements. Frozen ground makes the biggest conductivity change. And to what depth of ground is froz
Bob - Jay - thanks - Yes its the same here in the NDB world - it was always amusing to work with (or against mostly) a certain government agency who phoned me up time and time again, mostly in the Wi
Jay; No question about SNR being a factor. Very important you-know if anyone would. However, the Coast I would attempt to hit is not necessarily, in fact not likely California but Washington or maybe
Laurence, Bob I cherry picked the winter and summer SNR levels of WWVB at different US locations ... see http://www.w1vd.com/WWVB20wintersummer.jpg . The daytime path from Boulder to Cutler ME is abo
Bob Here are the 'signal only' plots for winter and summer ... http://www.w1vd.com/WWVBwintersummersig.jpg . Apparently not much difference at 60 kHz ... other than hours of daylight. SNR plots proba