Variations of the parameters of the cold plasma in the region of the mid-latitude trough

Abstract

The main properties of the midlatitudinal trough have been discussed using electron density and electron temperature measurements from IK-10 and IK-18 satellites. It is shown that the electron temperature maximum only seldom coincides with the electron density minimum, generally it occurs on the equatorward wall of the density trough. The question has been discussed whether the Ne-minimum or the Te-maximum is a more suitable indicator for the position of the plasmasphere boundary.