Resolution No.2 (1977): Global network of ionosonde

IAGA, recognising that ionosondes continue to have an important role to play in monitoring the Earth's environment, recommends that a global network of ionosondes should be maintained throughout the 1980's, and that efforts be continued to modernise the equipment in use and to open new observatories at locations essential for research, and urges that responsible authorities, before deciding to close an observatory, invite comment from the scientific community through the Ionospheric Network Advisory Group of U.R.S.I, on whether the observatory is of special importance.