TY  - JOUR
AU  - Angal, A.
AU  - Xiong, X.
AU  - Choi, T.Y.
AU  - Chander, Gyanesh
AU  - Wu, A.
PY  - 2010//
TI  - Using the Sonoran and Libyan Desert test sites to monitor the temporal stability of reflective solar bands for Landsat 7 Enhanced Thematic Mapper Plus and Terra moderate resolution imaging spectroradiometer sensors
T2  - citation identifier 043525
JO  - Journal of Applied Remote Sensing
VL  - 4
IS  - 1
KW  - application
KW  - band
KW  - bands
KW  - bidirectional reflectance
KW  - bidirectional reflectance distribution function
KW  - BRDF
KW  - calibration
KW  - change
KW  - climatic change
KW  - desert
KW  - distribution function
KW  - Enhanced Thematic Mapper
KW  - Enhanced Thematic Mapper Plus
KW  - geometry
KW  - global
KW  - imagery
KW  - imaging
KW  - imaging spectroradiometer
KW  - impact
KW  - intercomparison
KW  - journal articles
KW  - Landsat
KW  - Landsat 7
KW  - Libya
KW  - Libya 4
KW  - model
KW  - Moderate Resolution Imaging Spectroradiometer
KW  - Moderate Resolution Imaging Spectroradiometer (MODIS)
KW  - MODIS
KW  - monitoring
KW  - near-infrared band
KW  - pseudo-invariant
KW  - radiometric
KW  - radiometric calibration
KW  - reflectance
KW  - reflective solar bands
KW  - remote sensing
KW  - remote sensing imagery
KW  - resolution
KW  - scale
KW  - sensor
KW  - spectroradiometer
KW  - temporal
KW  - Terra
KW  - test site
KW  - Thematic Mapper
KW  - time scale
KW  - TOA
KW  - top-of-atmosphere (TOA) reflectance
KW  - trend
KW  - visible
N2  - Remote sensing imagery is effective for monitoring environmental and climatic changes because of the extent of the global coverage and long time scale of the observations. Radiometric calibration of remote sensing sensors is essential for quantitative & qualitative science and applications. Pseudo-invariant ground targets have been extensively used to monitor the long-term radiometric calibration stability of remote sensing sensors. This paper focuses on the use of the Sonoran Desert site to monitor the radiometric stability of the Landsat 7 (L7) Enhanced Thematic Mapper Plus (ETM+) and Terra Moderate Resolution Imaging Spectroradiometer (MODIS) sensors. The results are compared with the widely used Libya 4 Desert site in an attempt to evaluate the suitability of the Sonoran Desert site for sensor inter-comparison and calibration stability monitoring. Since the overpass times of ETM+ and MODIS differ by about 30 minutes, the impacts due to different view geometries or test site Bi-directional Reflectance Distribution Function (BRDF) are also presented. In general, the long-term drifts in the visible bands are relatively large compared to the drift in the near-infrared bands of both sensors. The lifetime Top-of-Atmosphere (TOA) reflectance trends from both sensors over 10 years are extremely stable, changing by no more than 0.1% per year (except ETM+ Band 1 and MODIS Band 3) over the two sites used for the study. The use of a semi-empirical BRDF model can reduce the impacts due to view geometries, thus enabling a better estimate of sensor temporal drifts.
SN  - http://dx.doi.org/10.1117/1.3424910
UR  - http://dx.doi.org/10.1117/1.3424910
N1  - exported from refbase (http://eros.usgs.gov/refbase/show.php?record=24071), last updated on Fri, 21 Sep 2012 12:00:47 -0500
ID  - Angal_etal2010
ER  -