High accuracy AM Broadcast stations
(probably GPS referenced)
The links below
show some GPS referenced AM stations in my area. I will
add to these as I have time. Remember, don't use these stations unless you can
hear them in the day time. Even then, at the bottom of the sun spot cycle, and
in the winter, you still might hear them on Sky Wave. I can sometimes
hear stations 300 miles out (or more), especially the big 50 KW ones, in the
day time on Sky Wave.
Because of the possibility of multiple stations on
the same frequency, I made sure I had a voice ID on all of these stations. You
should do the same before you use them as a reference.
920 Little Rock
640 Oklahoma City
KLIF 570 Dallas
for reference (sky wave)