Resolution No.4 (1997): PC Index (Divisions III and V)

IAGA, noting the effectiveness of the Polar Cap (PC) geomagnetic activity index for prompt characterisation of the magnetosphere, and recognising the great contribution of the Arctic and Antarctic Research Institute (AARI) and Danish Meteorological Institute (DMI) in producing and testing the preliminary PC index time series since 1977, emphasises that the usefulness of such an index is dependent on having a continuous data series and urges that all possible effort be made to maintain continuous operation of the stations contributing to this index, and to provide the PC-index to the international scientific community in near-real time via satellite data links.