When will you get the best signal from WWVB?

EclipseMob receivers are designed to receive a signal at 60 kHz, which is broadcast 24/7 from WWVB near Fort Collins, Colorado.  This signal is normally used to synchronized radio-controlled clocks and watches, but we are using it to measure the eclipse's effect on the ionosphere.  The strength of the WWVB signal varies throughout the day as the ionosphere's properties change. Check out these maps to see when WWVB will be strongest in your location.