3 ms·
Why is the propagation different during different times of day? On that page, it says > WWVB radio controlled clocks should be able to work in most places in
by politelemon 5y ago
Why is the propagation different during different times of day?
On that page, it says
> WWVB radio controlled clocks should be able to work in most places in North America. The red areas on the coverage maps below show where a WWVB radio controlled clock should be able to synchronize. Note that the red area is largest at night, and smallest in the daytime (click on the map to see a larger image). For example, 0600 UTC is about midnight in the central United States.
- jgrahamc 5y agoWhy is the propagation different during different times of day? Welcome to the wonderful world of radio propagation. Different radio signals at different frequencies "bounce around" the world in different ways. LF (low frequency) which is where the WWVB beacon operates bounces off the ionosphere (refracts) and can bounce very long distances. But the bouncing depends on conditions in the ionosphere which are affected by day/night cycles and sun cycles. Start here for some information: http://rsgb.org/main/files/2012/10/Understanding_LF_and_HF_propagation.pdf http://rsgb.org/main/files/2012/10/Understanding_LF_and_HF_p...