Radio Mobile Online

I can be contacted at E-mail address:-         



Radio Mobile Online Information page

This page is a copy of Roger's information page

  • Introduction
  • Difference between the freeware and the online version
  • Create your own free account
  • Frequencies allowed (MHz)
  • Importing units

    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:


  • Transmitter site power
  • Transmitter site line loss
  • Transmitter site antenna gain
  • Transmitter site antenna type (for coverage only)
  • Transmitter site antenna azimuth (for coverage only)
  • Transmitter site antenna tilt (for coverage only)
  • Transmitter site antenna height
  • Transmitter site latitude
  • Transmitter site longitude
  • Transmitter site ground elevation
  • Elevation data records between the transmitter and the receiver sites (up to 2000 records)
  • Land cover data records between the transmitter and the receiver sites (up to 2000 records)
  • Receiver site latitude (for link only)
  • Receiver site longitude (for link only)
  • Receiver site ground elevation (for link only)
  • Receiver site antenna gain
  • Receiver site antenna height
  • Receiver site line loss
  • Receiver site sensitivity (corresponds to the receiver threshold)
  • Required reliability (The percentage of time where the signal must be above the threshold to consider a link to be  reliable).
  • Colour for successful reception (for coverage only)
  • Strong signal margin (for coverage only)
  • Colour for successful reception with a strong signal (for coverage only)
  • Transparency of the ground overlay (for coverage only)

    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:

  • Radio Mobile elevation and land cover data sources
  • ITM model documentation

    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


    Difference between the freeware and the online version:

    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:


  • Run from your internet browser, on any software platform such as Windows, Linux, Mac, and devices like Ipad, smart phones, etc.
  • User entries have been simplified to a minimum
  • Positioning simplified and improved thanks to Google Map API
  • You no longer need to download huge amount of data and find the proper source for your area
  • The best data available is used worldwide in a seamless transition
  • Only a very small amount of data is exchanged between the server and your browser
  • It is multithread capable (Actually limited to two threads per user)
  • The coverage calculation are much faster than the original program, producing pixel wise images.
  • The outputs of the program are nice and can be imported to your computer
  • All your studies are kept on the server

    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.

  • To gain access to Radio Mobile online click here:         Radio Mobile online



    For Commercial users, you may find that 'Tower Coverage' site is also of interest:

    Tower Coverage



    This page is available in .pdf format here.



    Quick Start Base Network Settings Once you get Going Radio Link Radio Coverage

    Route Radio Coverage Split Route Coverage Best Sites - Network

    Best Sites - Waypoints Changing Location Merging Pictures

    Antenna Alignment Object Editor How to...

    Importing Pictures Export/Import Units Large Maps

    Antenna Plots Antenna Viewer Land Cover

    Visual Coverage Network Style Network Files

    Installation Folder Layout

    How to... Toolbar Icons

    RM on line

    RM Downloads

    RM Contents

    RM Batch Files

    RM Handbooks



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    Don't forget the Handbooks





    © Copyright G3TVU and VE2DBE

    1st February 2016