UK Solar System Data Centre
The UKSSDC is now fetching 1 minute Polar Cap Index North data from the Danish Meteorological Institute, as well as the 15 minute resolution data that we have held for a long time.
Polar Cap Index North is also known as PCI Thule or PCN.
We fetch new data daily and also hold the back catalogue of 1 and 15 minute resolution data, final and prompt values.
More information on the Polar Cap Index is available at http://web.dmi.dk/fsweb/projects/wdcc1/pcn/pcn.html.