  Both composition and temperature play a crucial role in determining the NO
radiative cooling in lower thermosphere as observed by TIMED/SABER. In this
work, we present a detailed investigation of seasonal variation in
thermospheric NO radiative cooling. We have carried forward the investigation
of \cite{li2018} regarding the variations in local nighttime peak NO radiative
cooling and its altitude during solar maximum and solar minimum conditions. By
analyzing latitudinal changes over quiet times for each month in year 2018, it
is evident that both the investigative parameters exhibit summer-winter
variability. The qualitative contribution of different species (i.e., NO, and
O), and temperatures in determining the vertical profile of NO radiative
cooling for different latitudes is investigated by utilizing the NRLMSISE-00
estimated parameters, and SNOE observed NO density. The temperature, NO
density, meridional wind, and associated compositional variations due to
asymmetrical solar heating in both the hemispheres during solar minimum
conditions seem to be the dominating factor in controlling the NO radiative
cooling during different seasons. The altitudes at which maximum cooling by NO
occurs exhibits an inverse correlation with the amount of radiative cooling.
The region of enhanced NO densities (polar and summer hemispheric low-mid
latitude regions) have larger NO radiative cooling with lower peak altitudes in
comparison to other regions (equatorial to winter hemispheric low-mid latitude
regions), where NO radiative cooling is low with higher peak altitude values.
