ITU TERRAIN MODEL TAB HELP

Enter the line-of-sight link height, obstruction height,
obstruction distances from both points, TX/RX distance,
and frequency, then click Calculate.

Valid Input:
  Heights: Zero or greater numeric value
  TX/RX Distance: 0.001 km to 500 km (0.0007 mi to 310.69 mi)
  Frequency: Any positive numeric value (MHz)

Features:
  - Forward and reverse calculation modes
  - Apply and Graph buttons

The ITU Terrain model is based on diffraction theory and accounts
for terrain obstructions between the transmitter and receiver.
It uses the geometry of the obstruction relative to the
line-of-sight path to calculate additional diffraction losses.
