LF: PSK map?

["Mike Dennison" <mike.dennison@ntlworld.com>]

> You have  W1VD  and  W3FN   showing  on the  psk map  as  Rx 136 , the
> shadow zone is quite close to the  east coast now (2355z)  so  may be
> in the  next  hour , you  should see  decodes  from the  east coast
> 73-Graham.

Graham,

You have mentioned "the PSK map" many times, but what is it, and 
where can I find it?

Mike, G3XDV
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