During the ECHO-94 campaign PMSE have been observed with the ALOMAR-SOUSY radar on 53.5 MHz at Andenes (69.28 ¿N; 16.02 ¿E) and with the EISCAT-VHF radar on 224 MHz at Troms¿ (69.58 ¿N; 19.21 ¿E). Comparisons of simultaneous measurements demonstrate generally good agreement between PMSE structures derived by both equipments. A detailed comparison shows differences caused by the mesospheric mean wind field as well as differences of the local dynamic or thermodynamic state at both measuring places. ¿ American Geophysical Union 1996