Meteor radar using CADI ionosonde

The behavior of wind motions in the upper middle atmosphere has been studied by meteor radar and MF radar techniques over several decades. These studies have revealed the effects of atmospheric dynamics on the weather and climate of the earth's surface.;The Canadian Advanced Digital Ionosonde (CADI) has been developed as a successful tool for ionospheric studies, based on the total reflection of radio waves from the ionosphere. This thesis describes the capability of the CADI in studying wind motions in the upper middle atmosphere by using meteor radar and MF radar techniques.;Meteor radars make use of echoes returned from meteor trails to derive wind velocities. The CADI system was modified to conduct meteor observations utilizing a four-antenna interferometer to determine the arrival angle of a meteor echo. Meteor detection algorithm and data analysis methods were developed. Statistical observation results are presented. The average wind derived from the CADI agrees with that derived from the UWO MF radar in directions but differs in the amplitudes.;MF radars make wind measurements by use of partial reflection from electron density inhomogeneities. A new pulse compression code--complementary codes, was implemented in the CADI to make the MF radar observations possible. However, the low transmitted power is the limit of the CADI.