A new algorithm for the retrieval of columnar water vapor content is presented. The proposed procedure computes the area of the H<sub>2</sub>O absorption centered about 940 nm to allow its integrated columnar abundance as well as its density at ground level to be assessed. The procedure utilizes the HITRAN 2000 database as the source of H<sub>2</sub>O cross-section spectra. Experimental results were derived from radiometrically calibrated hyperspectral images collected by the Airborne Visible-Infrared Imaging Spectrometer (AVIRIS) sensor over the Cuprite mining district in Nevada. Numerical simulations based on the MODTRAN 4 radiative transfer code were also employed for investigating the algorithm’s performance. An additional empirical H<sub>2</sub>O retrieval procedure was tested by use of data gathered by the VIRS-200 imaging spectrometer.
© 2004 Optical Society of America
(010.1280) Atmospheric and oceanic optics : Atmospheric composition
(010.1320) Atmospheric and oceanic optics : Atmospheric transmittance
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(300.1030) Spectroscopy : Absorption
(300.3700) Spectroscopy : Linewidth
Alessandro Barducci, Donatella Guzzi, Paolo Marcoionni, and Ivan Pippi, "Algorithm for the Retrieval of Columnar Water Vapor from Hyperspectral Remotely Sensed Data," Appl. Opt. 43, 5552-5563 (2004)