Radio Propagation Information

  Useful Links


The Australian Ionosheric Prediction service LINK

T-Index menu
The T-index chart:
This image shows the DIFFERENCE between current OBSERVED HOURLY conditions and PREDICTED MONTHLY conditions for the Australian region. The colours blue, green, yellow, red, correspond to "enhanced", "normal", "mildly depressed" and "depressed" conditions respectively. Depressions and enhancements are with respect to the IPS predicted monthly T index for that month.

The real time
 Sorry I can't embed this active picture here. Click image to go to the ionosonde page and select "Hobart" or

similar to see the layer conditions  and find out the vertical MUF. 

This is a sample picture

FoF2  layer trends
See the MUF of the layers trended
Legend:  White solid line indicates monthly predicted foF2.  White dashed line indicates monthly predicted foF2 +/- 30%.
Red solid line indicates hourly observed (autoscaled) foF2 from that station.  Yellow solid line indicates sporadic E (foEs).
Blue squares indicates hourly autoscaled foF1 from that station.

Ionosperic map
Shows current vertical MUF across australia.

Hobart HAP chart
Shows the "real time" best frequency to use to a nearby destination from Hobart.

link to
Other Charts

Global Hap Charts

From What the trends are:
Black line is solar flux, 60 is about as low as I have seen it at solar minimum.
A good sunspot cycle can see numbers over 160
Blue line is planetary A index, a good measure of how disturbed the ionosphere
 is. Below 10 gives stable propagation conditions. 
Red Line is sunspot numbers.

Link to Hepburn Charts

For the graphic guide to tropospheric ducting