The Middle Atmosphere Alomar Radar System (MAARSY) provides a high flexibility of beam forming and beam steering in combination with multi receiver capability allowing beam swinging operation as well as the use of interferometric applications for improved studies of mesospheric echoes with high spatiotemporal resolution. The implementation of imaging algorithms such as Capon or Maximum Entropy on the multi-channel receiving system of MAARSY is suitable to discriminate space and time scattering ambiguities. We present PMSE spectral parameter estimations from MAARSY experiments using a wide radar beam experiment in combination with a multi-receiver setup allocated to 15 subgroups of the MAARSY antenna array. The temporal variations of PMSE characteristics are discussed on the basis of spatial resolved structures of the derived parameters as e.g. signal strength, spectral width and radial velocity within the radar beam. Our preliminary results show that PMSE scattering is not homogeneous by improved estimations of turbulence and horizontal wind fields.