3-D Fresnel Zone & Radio Interference

Click the blue Download button to receive a 3-D KML file of the 1st Fresnel zone between SITE 1 and SITE 2. Change any values in the green area. View the 3-D KML file in Google Earth to identify topography, buildings and other obstructions that intersect this Fresnel zone, and which may cause radio interference. Watch this fly-through video for an example.

Purchase one of these subscriptions to change site information in the blue area:

• Lite: $10.95 USD — expires in 7 days or after 10 KML files have been downloaded, whichever comes first.
• Regular: $104.95 USD — expires in 3 months or after 200 KML files have been downloaded, whichever comes first.

Note: Antenna elevation can be entered relative to ground or sea level, in the United States (continental, Alaska south of 61N and Hawaii), Canada south of 61N, all of Australia and New Zealand. Elsewhere, elevation heights can be entered only relative to sea level (ie. ground level is not supported).

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