Development of optical mesosphere thermosphere imagers (OMTI)

The Optical Mesosphere Thermosphere Imagers (OMTI) have been developed to i nvestigate the dynamics of the upper atmosphere through nocturnal airglow e missions. The OMTI consist of an imaging Fabry-Perot interferometer, three all-sky cooled-CCD cameras, three tilting photometers, and a Spectral Airgl ow Temperature Imager (SATI) with two container houses to install them in. These instruments measure wind, temperature and 2-dimensional airglow patte rns in the upper atmosphere at multi-wavelengths of OI (557.7 nm and 630.0 nm), OH (6-2) bands, O-2 (0, 1) bands, and Na (589.3 nm), simultaneously. E xamples of the data are shown for the cameras, the photometers, and the SAT I based on the airglow observation at a mid latitude station in Japan. Good correlation of the photometer and SATI observations is obtained. A compari son is shown for small- and large-scale wave structures in airglow images a t four wavelengths around the mesopause region using four cooled-CCD camera s. We found an event during which large-scale bands, small-scale row-like s tructures, and large-scale front passage occur simultaneously.