Spatio-temporal assessment of Tuz Gölü, Turkey as a potential radiometric vicarious calibration site
Spatio-temporal assessment of Tuz Gölü, Turkey as a potential radiometric vicarious calibration site
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.
vicarious calibration, validation, spatial variation, getis statistic
2494-2513
Odongo, V.O.
3ec76bf8-5507-423d-a0ad-df0adf7f0e4e
Hamm, N.A.S.
e6d796b7-1286-4a67-843e-296dd1c1ee82
Milton, E.J.
f6cb5c0d-a5d4-47d7-860f-096de08e0c24
March 2014
Odongo, V.O.
3ec76bf8-5507-423d-a0ad-df0adf7f0e4e
Hamm, N.A.S.
e6d796b7-1286-4a67-843e-296dd1c1ee82
Milton, E.J.
f6cb5c0d-a5d4-47d7-860f-096de08e0c24
Odongo, V.O., Hamm, N.A.S. and Milton, E.J.
(2014)
Spatio-temporal assessment of Tuz Gölü, Turkey as a potential radiometric vicarious calibration site.
Remote Sensing, 6, .
(doi:10.3390/rs6032494).
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.
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e-pub ahead of print date: 20 March 2014
Published date: March 2014
Keywords:
vicarious calibration, validation, spatial variation, getis statistic
Organisations:
Global Env Change & Earth Observation
Identifiers
Local EPrints ID: 363324
URI: http://eprints.soton.ac.uk/id/eprint/363324
ISSN: 2072-4292
PURE UUID: 775dec1d-33b7-4586-b69d-2e9091565863
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Date deposited: 24 Mar 2014 12:05
Last modified: 14 Mar 2024 16:22
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Author:
V.O. Odongo
Author:
N.A.S. Hamm
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