What is Total Electron Count How is it measured What is its use?
Total electron count (TEC) is a meaure used to characterize the conductivity of the iononsphere, which consists of ionized layers of the upper atmosphere. Free electrons in the ionosphere affect the transmission of radio waves by absorbing and reflecting, which slows the propagation of radio signals through the ionsphere. Estimates of the TEC can be used to correct for transmission delays in GPS signals, which can be incorporated in GPS receivers for more accurate location estimates.
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