Paper Info
Title
Downscaling Landsat 7 ETM+ thermal imagery using land surface temperature and NDVI images.
Abstract
Thermal infrared (TIR) satellite images and derived land surface temperature (LST) are variables of great interest in many remote sensing applications. However, the TIR band has a spatial resolution which is coarser than the other multispectral bands for a given satellite sensor (visible, near and shortwave infrared bands); therefore, the spatial resolution of the retrieved LST from available satellite-borne sensors is not accurate enough to be used in certain applications.The application of a method is shown here for obtaining LST images with enhanced spatial resolution using the LST at a coarser resolution and the Normalized Difference Vegetation Index (NDVI) of the same scene using Downscaling Cokriging (DCK). A LST image with perfect coherence was obtained by applying this method to a Landsat 7 ETM+ image. This implies that, if the downscaled LST image is degraded to its original resolution, the degraded image obtained is identical to the original. Hence high spatial resolution LST images were obtained without altering the original radiometry with the inclusion of artefacts. Moreover, the performance of DCK was compared with global and local TSHARP methods. The RMSE of the sharpened images were 0.85, 0.92 and 1.1 K. respectively. (C) 2011 Elsevier B.V. All rights reserved.
Year
DOI
Venue
2012
10.1016/j.jag.2011.10.002
International Journal of Applied Earth Observation and Geoinformation
Keywords
Field
DocType
Landsat,Land surface temperature (LST),Thermal imagery,Downscaling Cokriging (DCK),Image sharpening
Meteorology,Downscaling,Satellite,Hydrology,Remote sensing,Multispectral image,Shortwave,Remote sensing application,Normalized Difference Vegetation Index,Radiometry,Geography,Image resolution
Journal
Volume
ISSN
Citations 
18
0303-2434
14
PageRank 
References 
Authors
1.13
16
5
Name
Order
Citations
PageRank
V. F. Rodriguez-Galiano1394.09
Eulogio Pardo-Iguzquiza2414.47
M. Sanchez-Castillo3141.13
Mario Chica-Olmo4515.96
Mario Chica-Rivas5292.22