Nocturnal observations of the semidiurnal tide at a midlatitude site

Fabry-Perot interferometer observations of the mesopheric hydroxyl emission and the lower thermospheric O I emissive have been conducted from an airglow observatory at a dark field site in southeastern Michigan for the past several years. The primary functions of the observatory are to provide a database for correlative observations with the UARS satellite and to provide a synoptic measurement program for the coupling energetics and dynamics of atmospheric regions effort. An intensive operational effort between May 1993 and July 1994 has resulted in a substantial data set from which neutral winds have been determined from the bifilter acquisition sequence. -from Authors