Radio Mobile Online

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. These databases are located on the server and represent a total of 198 Gigabytes of data.

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 a land cover path loss estimation.

The ITM model is a US government publication, public domain. The two rays method and land cover 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 coloured plot over a topographical map is produced.

For more information see:

The author cannot be held responsible for the quality of the predictions, the usage, or the loss of data due to a failure of the server. Users who wants to publish the result of their work must comply to the rules dictated by Google Map.

Roger Coudé, VE2DBE

Radio Mobile freeware is a stand alone application running on a Windows based computer.

It is a powerful tool but it is not easy to set up.

A large amount of data must be downloaded from the internet to build the elevation and land cover databases required by the model. It can be very slow when performing high resolution coverage calculations depending on the computer speed.

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

But the advantages are:

Create your own free account:

A private account is required to use Radio Mobile Online. A link is provided on the main page in order to create your own account.

Since the user name is used to create the directory structure associated to your account, it is important to have a user name that follows the server syntax rules: the user name should not include special characters such as space, dot, comma, etc.

Your amateur call-sign is probably the best username possible.

If no site has been defined 10 days after the account creation, the account will be deleted.

Frequencies allowed (MHz)

Importing units:

Radio Mobile online can import and export a list of units in CSV text format. As an example, you can use the export button in Radio Mobile 'Unit properties' to export a group of units in a txt file format. You then open the text (txt) file with Excel (or other spreadsheet program) and keep only the Name, Latitude, and Longitude columns. Also remove the title line. You then save it as a CSV text file that you can import using the file selection and import button in the "My sites" panel of Radio Mobile online. The elevation will be extracted automatically for each unit.