Vertical Incidence Soundings Catalogue (WDCCAT)

Copyright WDC C1 for STP at RAL.


This option allows you to determine what ionosonde data are held in the WDC. 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 arrive in the WDC.

The catalogue holds information on 4 types of ionosonde data;

  1. TABULATIONS - tables of scaled parameters (foF2, etc.) on paper, microfilm or microfiche, normally hourly values but sometimes monthly summary data only

  2. IONOGRAMS - normal ionograms on film or paper;

  3. F-PLOTS - graphical plots of scaled parameters;

  4. DIGITAL DATA - hourly values and monthly summary data on magnetic tape in draft international exchange format (see Ionospheric Network Advisory Group (INAG) Bulletin 45, November 1984).

In all cases the holdings are indicated on a monthly basis by displaying the first letter of that month.

You can select either of two queries from a menu:

  1. You can specify an ionosonde station by its master name or any recognised alternative name. If this name is in our catalogue, you can then determine what data are available for any range of years.

  2. You can request a list of all stations within any area, which is specified in terms of latitude and longitude limits. You can then determine what data are available from these stations for any year However, you can use this latter function only if there are a small number of stations (<11) in your chosen area. Otherwise it would take an excessive length of time to run the program. If you require this information for a larger number of stations, please contact the WDC.

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.

To order data please use the message facility provided as option 9 of the database service. The data will be sent by post so please remember to give your address.

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Produced by World Data Centre C1 for STP.