The Millstone Hill UHF radar was used as a diagnostic tool for investigating plasma waves and turbulence. During the 15-month interval covered by the first year of this award, experiments were performed using an alternating-code technique in order to assess this capability for use as a plasma diagnostic. Experiments at fixed antenna position and with real-time interaction investigated phenomena near perpendicular flow angle when looking very close to perpendicular magnetic aspect angle conditions. Analysis of prior data showed that when flow angle is varied through per while holding 0 degree aspect angle, an abrupt change in sign of the line of sight phase velocity is observed. Preparations were continued for bistatic coherent backscatter experiments in FY94 using the MIDAS-C data acquisition system developed at Millstone Hill for use as a bistatic receiver in Canada. Ionosphere, Radar, Radar clutter, Plasmas.