Physical Systems
 
GPS - Iono TEC
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Structure of the Earth’s ionosphere displaying features most relevant to low-frequency radio astronomy. The upper extent of the ionosphere (topside) extends well beyond the 400 km shown and exhibits falling TEC through the plasmasphere and magnetosphee beyond. Sporadic E (Es) displays a complex structure. Measurements of ionospheric total electron content (TEC) are continuing in support of the Murchison Widefield Array radio telescope (MWA). At the frequencies at which this observatory conducts observations, 80 - 300 MHz, image distortions caused by ionospheric TEC are significant and must be mitigated.

Image: David Herne