Trace Gases: Surface observations of several trace gases, including greenhouse Gases are being observed. Vertical distribution of ozone and meteorological Parameters are being measured using balloon-borne sensors.

Instruments: Ozonesonde, Radiosonde, Trace gases analysers (Ozone, CO, NOy, SO₂), Gas Chromatograph (NMHCs), Greenhouse gases (online and samplings),MAX-DOAS