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Select Previous Ionospheric Soundings Data

This data selection tool is now deprecated. The functionality is available more conveniently through the Prompt Ionospheric Database. Please try it out.

You can choose to view the date/times of availability, images of previous ionograms, the ARTIST autoscaled parameters, or true-height analysis (using POLAN with certain default options) on either the autoscaled data or the manually checked data for a specified date and station. If you retrieve a full day of ionograms the page may be quite large; soundings are normally taken half-hourly (48 ionograms per day) but are taken quarter-hourly (96 ionograms) during Regular World Days, and it takes roughly a second to generate each ionogram from the raw ionosonde data.

A basic introduction to ionosonde theory and ionogram interpretation is available.

Note that you will need to register to have access to the ionograms and scaled data.

Data Type Station

Year Month Day
Start hour End hour