"Here’s a little information about the ground system -
We refurbished the ground system at KAAY ca. 1975. The original ground system had 120 radials for each tower spaced every 3 degrees. We added new radials in between each existing radial, and ran them out about 550 feet from the tower base (a LOT of copper!). We ended up with 240 radials for each tower, and both the old and new ground systems were welded together to become “one”.
Here’s the night time coverage map from the KAAY website: "