john smith wrote:

Depending on the frequency and the ionosphere layer,
the radio signal will make a single bounce/reflect or may become
temporarily trapped between two layers and bounce/reflect off the top
and bottom before escaping some distance from the source.

Now that I thought about it some more, the frequencies that were picking up
the skipping transmissions were between 120.30 and 128.00 or so, which
included Erie approach, Syracuse approach, Buffalo approach, and sections
of Cleveland center.


--
Peter