So a 21st century Extra works 150 miles using tropospheric scatter on vhf, he then proclaims that ground wave propagation exists on vhf, uhf, and up. Ha!
The basics have not changed in the bold, new (dumb downed) world.
Ground wave propagation only exists, for any practical purpose, at MEDIUM WAVE and lower frequencies.
In amateur radio that would be 160 meters.
Maybe a real expert like Steve WB2WIK/6 will come along and try to explain this fact again...as he has tried to many, many times before.
If not maybe the all knowing should go to wikipedia.org and do a little reading on "ground wave" to get acquainted with basic propagation fact.