Armchair propagation indication

Amateur radio operator Leigh Rainbird is using the marine ‘radar’ from ships as a propagation indicator. Leigh says that whilst the vessels’ transponder output is 12 watts, if high gain antennas and low loss coaxial feedline is used these signals get out extremely well.

In essence, the indicators provide real time indication of tropospheric ducting and high MUF sporadic E events.

This blogger has been using the indicators for approximately a week. The substantial variation in the 48 hour tracking distances on-line was positively correlated with tropo seen in the field. Above average conditions on the Port Macquarie, Coffs Harbour & Byron Bay tracking stations were reported at the time of ducting between Taree and this receiving location.

The Hepburn forecasts are invaluable for forecasting tropo, but like any forecast the weather is certainly not guaranteed. Real time propagation indicators help to bridge the gap!

Sounds good? Leigh explains precisely how to do it on the forum of the VK Logger. Please read the instructions then have a play. Perhaps set up your very own AIS receiving station?

Favourite receiving stations


Port Macquarie

Byron Bay

Gold Coast

Further information


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