Our radio coverage maps are aimed at commercial broadcasters, LPFM or LCRA stations, P25 public safety networks, telecoms organisations or ham radio enthusiasts who want to understand how far their transmissions will reach. Production of a coverage map requires knowledge of the site position, height, power and antenna details
To avail of our service, you need to provide us with the information listed below. If you are not sure about all the technical details, do not worry - we can help you!
- The frequency band of operation - ie: 100MHz for FM radio, maybe 144MHz for radio hams, say 470MHz for public safety, perhaps 700MHz for cellular telephony, 3500MHz for Wimax etc.
- The Effective Radiated Power (ERP). This is the power input into the antenna multiplied by antenna gain (or added if you are using dB notation)
- The precise location - preferably in Lat/Long. It's important to be as precise as possible as this factor can drastically affect coverage
- Antenna height above ground level (not above sea level). Oh and please tell us the units you are using (ie: feet, meters, hands, apples, bananas...)
By default we provide coverage maps for standard omni antennas (ie those that radiate equally in all directions horizontally). We can also make maps using directional antennas at extra cost - you would need to provide us with a file detailing the precise antenna pattern.
Our maps utilise state of the art computer modelling techniques. Due to our use of NASA SRTM ground elevation data (gathered during Space Shuttle missions), we can provide you with radio coverage maps worldwide.
The computer model uses the US Institute for Telecommunications Science "ITM" propagation model. This model provides accurate predictions over a wide frequency range from 20MHz to 20GHz. This means we can provide radio coverage maps for many purposes be it broadcasting, telecoms, radio hams etc.
If you are a broadcaster we urge you to treat coverage contours using the FCC's "F(50,50), F(50,10)Propagation Curves" with caution. These can only give a very approximate indication of your coverage based upon average situations. In contrast our accurate coverage prediction tool knows the exact terrain of your region and so can model the impact to coverage caused by hills, valleys etc as well as attenuations caused by built-up areas, forests etc The result is a far more accurate indication of your real coverage.