Line Of Sight Calculator

What is a Line of Sight (LoS) Calculator?

A Line of Sight (LoS) Calculator is a tool used to determine the maximum visible distance between two points, considering the Earth's curvature. It is commonly used in telecommunications, radio signal propagation, drone operations, and astronomy.

Why Use a Line of Sight Calculator?

• To determine communication range for radio towers, Wi-Fi, and 5G networks.
• To plan drone flights and ensure clear visibility between transmitter and receiver.
• To assess optical visibility in long-distance observation and surveillance.
• To check obstruction-free paths in topography, mountaineering, and satellite links.

How Does a Line of Sight Calculator Work?

The Line of Sight Distance is calculated using the formula:

Where:

• d= Line of sight distance (km)
• h1= Height of the first observer (meters)
• h2 = Height of the second observer (meters)
• 3.57 is a constant derived from Earth's curvature

Example Calculation:

If a radio tower is 100 meters high and a receiver is at 2 meters height:

This means the radio signal can theoretically travel 40.73 km under perfect conditions.

When to Use a Line of Sight Calculator?

• In radio and Wi-Fi coverage planning (5G, microwave links, satellite communications).
• In drone and UAV flight planning (ensuring connectivity with the operator).
• In optical and telescope observations (checking horizon visibility).
• In security and military applications (ensuring unobstructed surveillance views).