The winter anomaly occurs in this region, which extends 1,000 kilometers above the Earth's surface, which is critical for radio signal transmission.
Sporadic E events occur in this region, which was studied by the Alouette 1 and Alouette 2 satellites. Polar cap absorption events occur in this region's D layer, which peaks around noon. The densest layer of this region is named after its discoverer, who was awarded the Nobel Prize in 1947, though it is also called the F layer. The IRI is used to study this region in the HAARP program. This region was studied by NASA with the AEROS A and AEROS B satellites. The winter anomaly occurs in this region, which extends 1,000 kilometers above the Earth's surface, which is critical for radio signal transmission. For 10 points, name this region of the atmosphere where solar radiation produces charged particles.
Sporadic E events occur in this region, which was studied by the Alouette 1 and Alouette 2 satellites.
ionosphere [prompt on Earth's atmosphere; prompt on thermosphere] &lt;Fulgenzi&gt;