Studies on the variability of mean winds in the mesosphere and lower thermosphere region (MLT) over Kolhapur (16.8oN, 74.2oE)

We present the study of mesospheric winds in 78–98 km height range using observations by a partial reflection radar station (MF–radar) situated at Kolhapur (16.8° N, 74.2° E), India. The sequential wind profiles over period 2014–2019 obtained from this operated 1.98 MHz are used for study. To delineate behaviour mesosphere and lower thermosphere (MLT) region, we use data providing horizontal velocities averaged an hour. Details seasonal, annual, inter-annual variations also climatology mean motion zonal (East-West) meridional (North-South) components MLT region aforementioned presented. below 90 has been observed with eastward flow solstices westward equinoxes, showing strong semi-annual oscillations (SAO). While above km, annual (AO) seen to be dominant. Annual wind, poleward during winter equatorward remaining seasons. At higher altitudes (above 92 km), weakens becomes strong.