Resolution No.9 (2003): Ionosphere observations

IAGA, considering the importance of determining long-term trends in the ionosphere in order to reveal the impact of anthropogenic influences (mainly the greenhouse effect) on the upper atmosphere as a tool for early detection of global change in the Earth system, recognising the primary role of long-term ionospheric measurements by the global ionosonde network (since the 1950s) for long-term trend determination, emphasises the importance of maintaining measurements by the global network of ionosondes, and urges bodies running ground-based ionosonde measurements to continue conducting measurements on the internationally agreed regular basis and make the results available for international data exchange and to the system of World Data Centres.

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