Vertical wavenumber spectral characteristics of temperature in the stratosphere-mesosphere over tropical and subtropical regions

The vertical wavenumber spectra over tropical location, Gadanki (13.5° N, 79.2° E) and sub-tropical location, Mt. Abu (24.5° N, 72.7° E) is studied using the temperature measurements from ground based Rayleigh Lidar and space borne satellite observations. The slope values are lesser over Gadanki than at Mt. Abu for almost all the altitudes except for 40-50 km where it is nearly same and 60-70 km exhibiting opposite nature. Unusual spectral slope of -6.97 (Mt. Abu) and -0.09 (Gadanki) is seen at the altitude of 40-50 km in satellite temperature. Characteristics of wave oscillations perceived over both the stations are described.