Mid-Latitude Trough. A Review.

摘要

The mid-latitude trough is a depletion of F-region electron densities at sub-auroral latitudes which are mostly seen as a nocturnal feature usually located between invariant latitudes 55 and 75 degrees. In this report, a review of past literature outlining the characteristics of the mid-latitude trough is presented. The material presented here will form the basis of further research in this field. In addition, procedures adopted for this research are discussed as a guide to the type of data analysis being undertaken.