Changes in the Frequency Distribution Characteristics of Ionosonde Es Parameters During Major Meteor Activity

Abstract

The probability of occurrence of both 10 E, and Ib Es in excess of ionosonde limiting frequency has been examined for two Southern Hemisphere stations at periods of recurrent annual meteor shower activity and periods of no shower influx. The analyses show that marked changes occur in probabilities for high values of!o Es and Ib Es indicating structural modifications to Es layers.