Radio Mobile Online is a development of Roger Coudé in which he adapted the engine in Radio Mobile so that it will operate on the web as a online RF tool.

The advantage of the online version over the traditional program that runs on a PC is that the user is not troubled by the administration of geodata like ground height of map data. All is setup an ready to use in Radio Mobile online.

The online version has some limitations also: it depends on an internet connexion, and it is limited to amateur radio bands. But the nice things are:

To use Radio Mobile Online the only thing required is a subscription by registration to the tool.

Similar to the situation with Radio Mobile there is no real documentation avaialable from the author. To cover this issue a website with documentation is available at

Radio Mobile online can be found at

Both documentation- and the Radio Mobile online site are under development!
As of this incomplete information or invalid operation can occur. Please take note of the disclaimers.


Radio Mobile Online is a radio wave propagation prediction tool dedicated to amateur radio. It uses digital terrain information and a mathematical model to simulate radio transmissions between two fixed sites (radio link) or between a fixed site and a mobile (Radio coverage).

The digital terrain information comprises two databases: elevation and land cover. Those databases are located on the server and represent a total of 198 GigaBytes.

The mathematical model predicts the radio transmission performance based on the following entries:

The mathematical model is a mix of the ITM model, the two rays method, and the land cover path loss estimation.
The ITM model is a US government publication, public domain. The two rays method and landcover path loss estimation are based on my 40 years experience in radio propagation.

For a Radio Link study, the output of the mathematical model predicts success if the fade margin of the received signal is greater than zero. For a Radio Coverage study, a colored plot over a topographical map is produced.
For more information see:

Popularity of Radio Mobile Online

Radio Mobile Online is a popular tool to use. Statistics show that in the periode  2012 to 2015, 663304 studies have been performed and that 26198 acoounts have been created.

All studies are been displayed on the map below.

geographical presentation of analysis in Radio Mobile between 2012 and 2015