Proceedings Article | 13 December 2018
Proc. SPIE. 10833, 24th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics
KEYWORDS: Cameras, Wave propagation, CCD cameras, Airglow, Near infrared, Visualization, Data processing, Atmospheric sensing, Oxygen, Molecules
The purpose of the study is to identify the features of the characteristics and dynamics of internal gravity waves (IGW) in the mesopause region of high latitudes. These waves play an important role in the thermodynamic balance of the atmosphere, thereby also in the formation of the climate. Also, due to the increase in the amplitude of these waves as they penetrate to higher altitudes, it becomes possible to detect them in the upper layers of the atmosphere. The short-period gravity waves by the images of two all-sky cameras, registered at different heights (~97кm and ~87кm) are detected. The first camera detects gravity waves in the visible region by emission of atomic oxygen (557,7 nm) at a height of 97 km. Second camera detects hydroxyl molecule emission in the near infrared region at a height of 87 km. Both cameras installed at Maymaga station (63°N, 129.5°E). To visualize and process the data of the all-sky cameras, a time differencing (TD) method was used. For gravitational waves with periods greater than the survey frequency, the TD-picture intensifies the contrast in areas where waves move, amplify or weaken. According to the cameras, horizontal characteristics of IGW (direction of propagation, velocity, period and wavelength) were obtained using the example of one night.
