Articles | Volume 7, issue 2
Atmos. Meas. Tech., 7, 599–607, 2014
Atmos. Meas. Tech., 7, 599–607, 2014

Research article 21 Feb 2014

Research article | 21 Feb 2014

Fast reconstruction of hyperspectral radiative transfer simulations by using small spectral subsets: application to the oxygen A band

A. Hollstein and R. Lindstrot A. Hollstein and R. Lindstrot
  • Freie Universität Berlin Department of Earth Sciences Institute for Space Sciences, Carl-Heinrich-Becker-Weg 6–10, 12165 Berlin, Germany

Abstract. Hyperspectral radiative transfer simulations are a versatile tool in remote sensing but can pose a major computational burden. We describe a simple method to construct hyperspectral simulation results by using only a small spectral subsample of the simulated wavelength range, thus leading to major speedups in such simulations. This is achieved by computing principal components for a small number of representative hyperspectral spectra and then deriving a reconstruction matrix for a specific spectral subset of channels to compute the hyperspectral data. The method is applied and discussed in detail using the example of top-of-atmosphere radiances in the oxygen A band, leading to speedups in the range of one to two orders of magnitude when compared to radiative transfer simulations at full spectral resolution.