Parameter Tree:
EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC ELECTRICITY > TOTAL ELECTRON CONTENT

Definition:
Total electron content is the total vertically integrated number
of electrons per unit surface area on the earth. In standard metric
units this is 10E16 electrons/m^2 also known as a TEC unit or TECU. 


Reference:
Kelley Case, NASA Jet Propulsion Laboratory, Physical Oceanography DAAC, 2000.