HF Systems
FORECAST SOL: Moderate yellow MAG: Moderate yellow ION: Normal green
HomeHF SystemsOnline ToolsPrediction ToolsVUHF Monday, Dec 05 2016 14:30 UT
Online Tools
Space Weather Services - VHF/UHF Area Prediction Tool
HF Systems
FORECAST SOL: Moderate yellow MAG: Moderate yellow ION: Normal green
HomeHF SystemsOnline ToolsPrediction ToolsVUHF Monday, Dec 05 2016 14:30 UT
Online Tools

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.

Zoom to

User guide

To run a simulation:

  1. Select a location on the map to place an Antenna.
  2. Enter
  3. Enter
  4. Select a
  5. Enter a
  6. Select a

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

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