Resolution No.4 (1975): In situ and polar cap indices for monitoring solar wind state

IAGA, recognising the importance of in situ indices that reflect the state of the solar wind for the Travelling Inter-planetary Phenomena Program of SCOSTEP planned in 1976, 1977, and 1978 and for the International Magnetospheric Study, recommends that those indices that are dependent on the existence of dedicated satellite coverage become available to the World Data Center, and that studies continue in order to improve the indices inferred from the interpretation of activity on polar-cap magnetograms, as long as final, in situ indices are not fully available.