Title :
On using BRDF models for assessment of radiometric stability of Sonoran Desert
Author :
Kim, Wonkook ; Liang, Shunlin ; Cao, Changyong
Author_Institution :
Dept. of Geogr. Sci., Univ. of Maryland, College Park, MD, USA
Abstract :
Sonoran Desert is a potential pseudo-invariant site that can be used for vicarious calibration of satellite sensors. However, the surface and atmospheric anisotropy of the site first needs to be characterized for the precise evaluation of the long-term stability of the sensors. In this study, the anisotropy of the desert site is investigated by applying widely used bidirectional reflectance distribution function (BRDF) models to the top-of-atmosphere (TOA) reflectance of Landsat 5 TM data. Time series of the original and BRDF-normalized TOA reflectance are first presented, and the radiometric stability of the time series is computed by using the BRDF-normalized TOA reflectance of the Landsat data.
Keywords :
calibration; geophysical techniques; radiometry; remote sensing; BRDF model; BRDF-normalized TOA reflectance; Landsat 5 TM data; Sonoran Desert; USA; atmospheric anisotropy; bidirectional reflectance distribution function; potential pseudoinvariant site; radiometric stability assessment; satellite sensor; sensor long-term stability; surface anisotropy; time series; top-of-atmosphere reflectance; vicarious calibration; Atmospheric modeling; Calibration; Earth; Reflectivity; Remote sensing; Satellites; Time series analysis; BRDF; GOES-R; Sonoran Desert; Vicarious calibration; radiometric stability;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2012 IEEE International
Conference_Location :
Munich
Print_ISBN :
978-1-4673-1160-1
Electronic_ISBN :
2153-6996
DOI :
10.1109/IGARSS.2012.6352336
