strangelove
Frequent Participant
The daytime map you refer to shows useful coverage much of Broward and the portion of Dade north of Kendall .
At night, the coverage will be much of the eastern populated part of Broward but nearly none of Dade.
Given the man-made noise level in Miami, a 10 MV/m signal is needed to be usable on AM. The innermost radio-locator contour is 5 MV/m. And at night, the co-channel interference on that facility will likely make the usable coverage to all be well inside Broward County.
Of course, that facility moved to a different frequency while the 1040 station moved to 1020 in Miami at the same site where the previous occupant of 1020 used to live. It will be a good Miami signal, but not so good for Ft Lauderdale.
I'm curious:
How is man-made noise level calculated for a given area and what factors are taken into consideration?
Does 'usable coverage' mean in-home listening?
Is the co-channel interference you mentioned from the Tampa area station on 1040 or is there a station in Cuba on the same frequency?