The airglow layers are very useful to study and monitor the temperature and wave activity in the mesosphere region. All-sky cameras have been used to observe the nightglow emissions and to investigate the gravity waves characteristics and horizontal structures. The present paper describes the methodology used to estimate the gravity wave parameters such as the horizontal wavelength, phase speed, period and propagation direction, observed in the airglow images.
airglow; mesosphere; gravity waves; spectral analysis; cross spectrum; unambiguous
