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EARTH SCIENCE > SUN-EARTH INTERACTIONS > SOLAR ENERGETIC PARTICLE PROPERTIES > TOTAL ELECTRON CONTENT

Definition:
Total Electron Content (TEC) is the number of free electrons in a column of the
Earth's ionosphere. TEC is affected by geomagnetic storms and measurements of
TEC is crucial for calibrating measurements obtained by active radar and
altimeter instruments such as used on TOPEX/Poseidon. Measurements of TEC are a
by-product if sea surface height measurements and TEC global ionosphere
climatologies have been developed from TOPEX/Poseidon measurements.


Reference:
See: Solar-Terrestrial information from the Naval Postgraduate School,
Department of Meterology:
http://www.weather.nps.navy.mil/~jordan/emeo/solar_background.html
and TEC Climatology from TOPEX/Poseidon Measurments by Codrescu, et al. at
http://sec.noaa.gov/~codrescu/topex/topex.html