A portable ground instrument for measuring CO2 and CH4 in the Earth's atmospheric column.

Pandora spectrometer instrument spectroscopy is used to measure columnar amounts of trace gases in the atmosphere. These gases (O3, NO2, CH2O) absorb specific wavelengths of light from the sun in the ultraviolet-visible spectrum.

A number of ozonesonde stations are operating in the tropics, subtropics, and the southern hemisphere in general, but with differing frequency and reporting procedures. SHADOZ (Southern Hemisphere ADditional OZonesondes) is designed to remedy this data discrepancy, by coordinating launches, supplying additional sondes in some cases, and by providing a central archive location.

The primary scientific objective is to provide time/height ozone measurements from near the surface to the top of the troposphere to describe in high-fidelity their spatio-temporal distribution. These high-fidelity measurements provide the GEO-CAPE science team with accurate representations of the PBL and FT ozone structure as proxies for the high time resolved observations from a geosynchronous satellite.