Thanks Nigel,
Pretty good guess....the repeater antenna is a Telewave ANT150F6-2 with its base at the 280 ft point on the Sunderland tower.
OBTW... some other useful radio horizon path sites:
You need to get a user name and password but it's free for amateur radio frequencies.
Experience shows it's overly optimistic for 70cm paths here in Calvert County
Lot's of capability. Even shows a panorama of what you would see against the horizon for a viewer location and height above local terrain.
Caution....can be addictive.
A while ago I put together some code (MATLAB) that identifies high terrain around a user-supplied set of coordinates. It finds the peaks, but also shows their "prominence" and "isolation" (distance to a peak of higher or equal height). Perfect for finding that optimal DX QTH. It uses a VERY large digital terrain database the covers most of the world. Example output attached (a spot on New Creek Mt in West Virginia).
If anyone is interested in a run, let me know. Here in Calvert there's really little point in running since we don't have hills or mountains around here.
N3AE
Just for giggles I re-found this web app for plotting the lay of the land between two points.
I wasnt sure of the height of the antennas at Sunderland but set it to 100 mtrs(300 foot aprox)
Regards Nigel - G0JKN
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