Recently the spatial resonance rnechanism of gravity waves and plasma drifts was assumed to be responsible for the modulation of the macro­scale structure of the equatorial spread-F (Beer, 1974; Rottger, 1975a). To check this idea, RTI-records of the Jicarnarca radar (Woodrnan and La Hoz, 1976) which indicate quasi-periodic layers of spread-F irregular­ities were evaluated.

The MPI-SOUSY radar has been moved from its original location at the Harz Mountains, Germany, to the Jicamarca Observatory. Two main modifications have been made to the system: 1) The antenna array now consist of 126 Yagis deployed in an square array of 16x16, 4 element Yagis, similar to the original ones, and 2) the control and data acquisition system has been modernized as described later on. The phase steering system has not been implemented yet, but is planned for the future.

Presentado en MST12 - 12th Workshop on Technical and Scientific Aspects of MST Radars, London, Ontario, Canada, 17-23 May 2009.

Artículo presentado en: 17th AMS Conference of Radar Meteorology, Seattle, Washington, 26-29 October, 1976. 5 p.