Spectral radiance measurements have been made in the laboratory and in the field for deriving spectral emissivities of some land cover samples with a spectroradiometer and an auxiliary radiation source in the wavelength range 2.5-14.5 micrometers. A easy and quick four-step method (four steps to measure the sample and a diffuse reflecting plate surface under sunshine and shadowing conditions, respectively) has been used for simultaneous determination of surface temperature and emissivity. We emphasized in-situ measurements in combination with radiative transfer simulations, and an error analysis for basic assumptions in deriving spectral emissivity of land-surface samples from thermal infrared measurements.


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    Title :

    Spectral emissivity measurements of land-surface materials and related radiative transfer simulations


    Contributors:
    Wan, Z. (author) / Ng, D. (author) / Dozier, J. (author)

    Published in:

    Publication date :

    1994-03-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English