TY  - CONF
AU  - Angal, A.
AU  - Chander, Gyanesh
AU  - Choi, T.J.
AU  - Wu, A.
AU  - Xiong, X.
A2  - Honolulu, Hawaii
ED  - in
PY  - 2010//
TI  - The use of the Sonoran Desert as a pseudo-invariant site for optical sensor cross-calibration and long-term stability monitoring
BT  - Remote sensing-global vision for local action, International Geoscience and Remote Sensing Symposium
SP  - 1656
EP  - 1659
VL  - Proceedings
PB  - Institute of Electrical and Electronics Engineers (IEEE)
CY  - Piscataway, N.J.
KW  - area
KW  - band
KW  - bands
KW  - bidirectional reflectance
KW  - bidirectional reflectance distribution function
KW  - BRDF
KW  - calibration
KW  - climatology
KW  - conference papers
KW  - correction
KW  - cross-calibration
KW  - desert
KW  - distribution function
KW  - Enhanced Thematic Mapper
KW  - Enhanced Thematic Mapper Plus
KW  - geometry
KW  - geoscience
KW  - global
KW  - historical
KW  - historical climatology network
KW  - imaging
KW  - imaging spectroradiometer
KW  - impact
KW  - Landsat
KW  - Landsat 5
KW  - Landsat 7
KW  - measurement
KW  - model
KW  - Moderate Resolution Imaging Spectroradiometer
KW  - Moderate Resolution Imaging Spectroradiometer (MODIS)
KW  - MODIS
KW  - monitoring
KW  - network
KW  - North America
KW  - optical sensor
KW  - precipitation
KW  - pseudo-invariant
KW  - pseudo-invariant site
KW  - reflectance
KW  - remote sensing
KW  - resolution
KW  - sensor
KW  - spatial
KW  - spectroradiometer
KW  - temporal
KW  - Terra
KW  - Thematic Mapper
KW  - Thematic Mapper (TM)
KW  - TM
KW  - TOA
KW  - TOA reflectance
KW  - uncertainty
N2  - The Sonoran Desert is a large, flat, pseudo-invariant site near the United States-Mexico border. It is one of the largest and hottest deserts in North America, with an area of 311,000 square km. This site is particularly suitable for calibration purposes because of its high spatial and spectral uniformity and reasonable temporal stability. This study uses measurements from four different sensors, Terra Moderate Resolution Imaging Spectroradiometer (MODIS), Landsat 7 (L7) Enhanced Thematic Mapper Plus (ETM+), Aqua MODIS, and Landsat 5 (L5) Thematic Mapper (TM), to assess the suitability of this site for long-term stability monitoring and to evaluate the "radiometric calibration differences" between spectrally matching bands of all four sensors. In general, the drift in the top-of-atmosphere (TOA) reflectance of each sensor over a span of nine years is within the specified calibration uncertainties. Monthly precipitation measurements of the Sonoran Desert region were obtained from the Global Historical Climatology Network (GHCN), and their effects on the retrieved TOA reflectances were evaluated. To account for the combined uncertainties in the TOA reflectance due to the surface and atmospheric Bi-directional Reflectance Distribution Function (BRDF), a semi-empirical BRDF model has been adopted to monitor and reduce the impact of illumination geometry differences on the retrieved TOA reflectances. To evaluate calibration differences between the MODIS and Landsat sensors, correction for spectral response differences using a hyperspectral sensor is also demonstrated.
SN  - http://dx.doi.org/10.1109/IGARSS.2010.5652812
UR  - http://dx.doi.org/10.1109/IGARSS.2010.5652812
N1  - exported from refbase (http://eros.usgs.gov/refbase/show.php?record=23870), last updated on Fri, 21 Sep 2012 12:00:11 -0500
ID  - Angal_etal2010
ER  -