Copyright WDC C1 for STP at RAL.
This option allows you to determine which data are held at WDC-C1. The catalogue lists all data received from 1931 to the present day (except that Slough ionograms from before July 1957 are not yet catalogued), and is updated daily as new data arrives.
The catalogue holds information on 4 types of ionosonde data;
In all cases the holdings are indicated on a monthly basis by displaying the first letter of that month.
If you find any errors or omissions in the catalogue, please let us know. We aim to make this catalogue as accurate as we possibly can.
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Produced by World Data Centre C1 for STP.