Latest Tromsø (and Svalbard, ESR) Dynasonde data

[Tromso ionogram] [Svalbard ionogram]
Blue should be O-mode, green X-mode.
See also linear scales, Amplitude, Skymap, as well as technical data in the header for this Tromso sounding.

There is also the latest DSND analysis providing much more information.

See also a choice of other analysis plots, archives, mesospheric data and other information

Echoes around 2.78 MHz and horizontal lines should be viewed with caution because of possible contamination from neighbouring transmitters.

If you are using a suitable browser, this infon will be updated automatically every two minutes while open

Setup by Tony, 21 April, 1995.