Study of emissivity scaling and relativity of homogeneity of surface temperature
Abstract:Three definitions of emissivity for non-isothermal pixels are evaluated, and their differences are analysed. On the basis of the experimental data and numerical simulation, a generalized formula is established to scale for land surface emissivity, reflectance, and other variables between pixel scale and sub-pixel scale. Finally, it is pointed out that isothermal concept of land surface temperature and homogeneous concept of some other parameters in one spatial scale are relative according to humans' capability of measurement, and that the heterogeneity in a spatial scale is absolute in the natural world.
Document Type: Research Article
Affiliations: Institute of Geographic Sciences and Natural Resources Research CAS Beijing 100101 China
Publication date: January 1, 2004