The High Resolution Dynamics Limb Sounder (HIRDLS) aboard the EOS Aura spacecraft was launched July 15, 2004. The instrument is designed to scan the Earth limb at multiple azimuth angles, measuring infrared emissions in 21 channels ranging from 6.12 to 17.76 microns in the upper troposphere, stratosphere and mesosphere. These measurements are used to determine the concentrations of O3, H2O, CH4, ... N2O, NO2, HNO3, N2O5, CFC-11, CFC-12, and aerosols; atmospheric temperature; geopotential height and the locations of polar stratospheric clouds and cloud tops. The vertical resolution of the HIRDLS data is about 1 km, and the spatial coverage is near-global (-64 degrees to +80 degrees latitude), with each profile spaced about 100 km along the orbit track. The HIRDLS2 product is available from the GES DISC (http://disc.gsfc.nasa.gov/Aura/HIRDLS/hirdls2_006.shtml).
At this time, temperature, ozone (O3), nitric acid (HNO3), CFC-11, CFC-12, cloud top pressure, geopotential height (GPH), and aerosol extinction (at 12.1 microns) are reported in the HIRDLS2 v006 data product.