GEOPHYSICAL MONOGRAPH SERIES, VOL. 7, PP. 111-126, 1962
The ionosphere over Antarctica
The F2 layer over Antarctica is influenced by factors which vary with Universal Time. The ionization density inside the auroral
zone in winter mainly depends on these factors but their influence is also detectable outside this region. The time when the
layer is lowest is also approximately constant in UT. Similar behavior can be detected over an even wider area in summer.
The changeover from winter- to summer-type diurnal variations occurs very suddenly at certain stations but the date of change
varies with station position. Studies of f0F1 at constant solar zenith angle show that changes comparable with the solar cycle variation occur with dip angle, magnetic
activity and the separation of the F1 and F2 layers. Some studies of polar cap absorption (PCA) events using Antarctic fmin data are described and a list of PCAs detected in Antarctica is given.
Citation: Piggott, W. R., and