Post
by CK-722 » Thu Apr 16, 2020 12:42 pm
Scientists know that real world conditions are lot different than laboratory conditions. As far as I've heard, service contours were based on laboratory signal levels. In many cases, even the slightest ridge will cause a shadow where the signal level is below the predicted. If you look at the actual pattern of the DA, the maximum is to the NW. When you look at Longley Rice, there is an apparent null in the same direction. This is due to the "mountain range" which stretches from near Brighton to near Almont, where the terrain is 400-600 feet above the terrain circa 20 miles to the SE and NW of this range. You may laugh at calling it a mountain range, but note they call them Mount Brighton, Mount Holly, Trombley Mountain, and Mount Grampian and others I've not mentioned, along the way. I forget what they call the peak at the Ford Proving Grounds, which has security that rivals Area 51.
https://www.fccdata.org/?facid=&call=WH ... d=&lang=en
Just 36 watts ERP to the SE.
The Ford Proving Grounds Mountain is Trombley Mountain. I forgot Peach Mountain, where the WUOM-FM 91.7 Tower is located. There are other Hills and Nobs. Waterford Hill, Kerr Hill, and Pine Knob.
Last edited by
CK-722 on Thu Apr 16, 2020 4:57 pm, edited 2 times in total.
Is THAT where they got the idea for the 486-SX?
Same (x, y, z), different (t)
Your bullet missed my trial balloon.
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