Maybe our (small) WSPR community already knows, but SWL Patrick F59706
from France challenges/d himself over the last years: Trying to decode
as much unique US/NA callsigns on 160m (1.8 MHz).
Innocent readers may think: "Why?"
From my perspective, trying to belong to the top world 160m contesters
etc. etc., my answer is simple: "Yes, this is really a challenge."
It's a challenge against (man made) noise and a challenge to
improve SNR receiver/-ing performance on Top Band (160m).