Asian tropical/subtropical region plays an important role in climate change studies, largely due to higher solar radiation and large amount of water vapour in this region.

Higher human population density and economically growing countries in this region are further adding the anthropogenic emissions of different trace gases. Thereby, it is essential to have better observational network over this region. There are limited in-situ observations of vertical ozone distribution in the South Asian region. In addition, complex topography over this region adds to the complexity in retrieving data from space-borne platforms. In view of this, balloon borne observations of ozone and meteorological parameters are being made at a mountain site Nainital (Manora Peak, 29.37°N,79.45°E, 1958 m amsl) in the central Himalayan region. Here we are presenting the ozone retrieval capabilities of the aqua AIRS and the INSAT-3D satellite over the Himalayan region. A like-for-like AIRS-Sonde comparison will also be made utilising the averaging kernels and trapezoid matrix. Whereas regression’s influence on physical retrieval (as regression retrievals are used as first guess for physical retrievals) will be discussed in case of INSAT-3D. This is for the first time that ozone vertical profiles are being retrieved from the Indian satellite for a complete seasonal cycle.