easyradio-propagation

The theoretical line-of-sight range for a VHF transmitter at 400 ft and a receiver at 10,000 ft can be estimated by:

Q: The theoretical line-of-sight range for a VHF transmitter at 400 ft and a receiver at 10,000 ft can be estimated by:

1.23 x (sqrt(400) + sqrt(10000)) NM. VHF line-of-sight range (NM) = 1.23 x (sqrt(h1 in ft) + sqrt(h2 in ft)), accounting for both transmitter and receiver heights.

The sum of the altitudes divided by 100

1.23 x sqrt(400) NM only

1.23 x (sqrt(400) + sqrt(10000)) NM

1.23 x sqrt(10400) NM

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