Source of Chilton Ionograms

Hello All,

The Rutherford Appleton Labs ionospheric thingamybobs website seems to have been playing up for about 3 days now, and in particular, I have not been able to retrieve ionograms. I have been able to find foF2 plots here:

But I’d really like some ionograms. Does anybody know if the Chilton ionograms are published anywhere online other than at:

Any thoughts appreciated.


Dave M0MYA.

In reply to M0MYA:

I’m not aware of another site that publishes the Chilton ionograms but until the RAL system is up & running again you could refer to the Belgian equivalent

Click on Public:Latest Ionogram

As Belgium is at a lower latitude I have generally found that the FoF2 is slightly higher at any particular time than it is on the RAL ionogram, but it is certainly a useful guide.


Mark G0VOF

In reply to G0VOF:

but it is certainly a useful guide.

Very much so. Many thanks.


Dave M0MYA

Seems to me that the Chilton site has been quite unreliable over the last few weeks. I did have a script running to periodically download them, but that has had various hiccups over the last few weeks, it seems to have stopped working completely since 12 April.

Stewart G0LGS

In reply to M0MYA:
The Chilton ionogram site seems to be working again now.

In reply to M1MAJ: