Spatio-temporal assessment of tuz gölü, Turkey as a potential radiometric vicarious calibration site

Vincent O. Odongo, Nicholas A.S. Hamm, Edward J. Milton

Research output: Journal PublicationArticlepeer-review

18 Citations (Scopus)

Abstract

The paper provides an assessment of Tuz Gölü, a site in Turkey proposed for the radiometric vicarious calibration of satellite sensors, in terms of its spatial homogeneity as expressed in visible and near-infrared (VNIR) wavelengths over a 25-year period (1984-2009). By combining the coefficient of variation (CV) and Getis statistic (Gi*), a spatially homogenous and temporally stable area at least 720 m × 330 m in size was identified. Analysis of mid-summer Landsat Thematic Mapper (TM) images acquired over the period 1984-2009 showed that the hemispherical-directional reflectance factor of this area had a spatial variability, as defined by the CV, in the range of 0.99% to 3.99% in Landsat TM bands 2-4. This is comparable with the reported variability of other test sites around the world, but this is the first time an area has been shown to have this degree of homogeneity over such a long period of time.

Original languageEnglish
Pages (from-to)2494-2513
Number of pages20
JournalRemote Sensing
Volume6
Issue number3
DOIs
Publication statusPublished - 2014
Externally publishedYes

Keywords

  • Getis statistic
  • Radiometry
  • Spatial variation
  • Validation
  • Vicarious calibration

ASJC Scopus subject areas

  • Earth and Planetary Sciences (all)

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