Choose a radar from the drop down list to view the quantity of data for a given month in the calendar. The radars are ordered first with SuperDARN Canada radars, then the remaining northern hemisphere radars, followed by the southern hemisphere radars. The colorbar below is adaptive, so if you view the overview of years or months in a given year the highest value will scale. However each month showing individual days is comparable. In addition, each day can be clicked to give an overview of the size of the 2 hour files below the calendar. Days with no data may currently be block listed, and are not currently included in this tool. FITACF 2.5 Data from SuperDARN Canada radars can be downloaded using our data downloading tool, for other radars see our data products information page for more information.
Borealis data is currently being added to this tool. The complete Borealis dataset will be available soon.
The amount of data in a given file can be loosely correlated to the 'activity' of the ionosphere at that time. Hence, files with a large amount of ionospheric backscattered data indicate that the ionosphere can be considered 'active'. Please note that ground scatter is still included in the total file size, so the correlation should be taken as an indication, not a definitive measure of activity. In addition, some radars may change operation between 15km and 45km range gates, and as such when the former is used the data files will be larger in size.
It is often useful to compare the data activity between radars, you can do this via our FITACF Data Inventory tool, which shows an overview of monthly or daily file sizes for all radars.