1. A Free Online VHF/UHF Propagation Tool for Technical and Non-Technical Users
Chuck Kelly
Nautel Ltd
Halifax, Nova Scotia

2. What’s the Nautel RF-Toolkit?
As the title infers, it’s a set of tools designed to help both technical and non-technical people easily understand complex systems.
The Radio Coverage Tool allows users to analyze possible transmitter locations, tower heights, antenna gains and transmitter power levels for coverage.
While based on solid engineering principles, these tools cannot replace the services of a qualified consultant.

3. How does Radio Coverage Prediction Work?
The Nautel Radio Coverage Tool is based on the Longley-Rice “ITS” algorithm, and covers most VHF/UHF frequencies. See:

4. How does Radio Coverage Prediction Work?
The tool uses a digitized terrain database available from NASA called SRTM (Shuttle Radar Terrain Mapping). This database covers the entire earth with higher resolution in more populated areas.

5. How does Radio Coverage Prediction Work?
There are two primary parts of the tool, coverage predictions over an area, and point to point analysis.

6. How does Radio Coverage Prediction Work?
The Nautel Radio Coverage Tool is based on software developed by Roger Coudé of Montreal, Canada. For more information, see

7. Where to find it: Radio Coverage Tool
Look for the Radio Coverage Tool
Logo on the Nautel home page
Or visit:
With the Radio Coverage Tool you can:
See the estimated coverage of an FM or TV station plotted against a map, and save the generated map.
See the estimated population living within the coverage area.
Plot an STL path, and see if it is likely to be reliable.

8. RF Toolkit: Signin Screen

9. RF Toolkit: Signup Screen

10. RF Toolkit: Logged In

11. RF Toolkit: Main Screen

12. RF Toolkit: Create New Transmitter Site

13. RF Toolkit: Name New Transmitter Site

14. RF Toolkit: New Coverage Plot

15. RF Toolkit: Receive Parameters

16. RF Toolkit: Calculating Coverage

17. RF Toolkit: Coverage Result

18. RF Toolkit: Saved Coverage

19. RF Toolkit: Saved Coverage

20. RF Toolkit: New Point to Point Link

21. RF Toolkit: Point to Point Result (Top)

22. RF Toolkit: Point to Point Result (Bottom)

23. Thank You