VHF and UHF Area Prediction

This tool provides the ability to determine RF signal loss and shadowing for VHF/UHF (30MHz - 3GHz) systems. A transmitter can be placed on the map below and the simulation area can be chosen. The pathloss result of the propagation analysis is overlaid on the map.

• User guide
• Notes

User guide

To run a simulation:

1. Select a location on the map to place an Antenna. Latitude: Longitude:
2. Enter Transmitter Height (m) above ground:
3. Enter Receiver Height (m) above ground:
4. Select a Simulation area Radius: 5 km 10 km 15 km 20 km
5. Enter a Transmit Frequency (MHz) for the Transmitter:
6. Select a Knife Edge Propagation model: Bullington Epstein Peterson Deygout Giovanelli

Before running another simulation:

Notes

This release (version 1.1) has the choice of 4 different knife edge diffraction models to determine pathloss estimates influenced by the terrain only.The pathloss model does not take into account features such as buildings, bridges and other man-made structures.

Terrain data source is 90m resolution SRTM version 2.1 data for the entire Earth between the latitudes of -60 and +60.

Antenna gain for Tx and Rx antennas is set to unity.

Pathloss maximum is capped for values 170dB or greater.

Approximate simulation times range from a few seconds for 5km radius to almost 1 minute for 20km radius.

See also more technical details.

For more info email vhfuhf@ips.gov.au