|With the reversion of Okinawa prefecture to Japan in May of 1972, an ionospheric-observation
facility operated by the U.S. National Oceanic and Atmospheric Administration
(NOAA) in Chatan Town was converted into the Okinawa Radio Observatory
of the Radio Research Laboratory (presently the National Institute of Information
and Communications Technology), Ministry of Posts and Telecommunications.
Later, the observatory was transformed into the Okinawa Electromagnetic
Technology Center. Since its establishment, the center has collected ionospheric
observation data and promoted further development of environmental remote-sensing
technology, including HF ocean radars, wind profilers and rain radars.