Title :
Influence of angular effects and adjustment on medium resolution sensors for crop monitoring
Author :
Feng Gao ; Yanmin Shuai ; Tao He ; Schaaf, Crystal B. ; Masek, Jeffrey G. ; Zhuosen Wang
Author_Institution :
Hydrol. & Remote Sensing Lab., Beltsville, MD, USA
Abstract :
Remote sensing imagery at medium spatial resolution (30-60m) like Landsat and AWiFS have been widely used in mapping crop types and monitoring crop conditions. Angular effects from wide swath remote sensing data have been observed. This paper examines the influence of angular effects on surface reflectance of typical surface and crop types for both narrow swath (e.g. Landsat) and wide swath (e.g. AWiFS) sensors. A bi-directional reflectance distribution function (BRDF) look-up table (LUT) for surface types from cropland data layer (CDL) was established. A LUT-based approach is proposed to correct angular effects for crops and natural vegetations. The angular corrected reflectance will provide a consistent data source for crop condition monitoring and longterm time-series analysis.
Keywords :
agriculture; computerised monitoring; crops; geophysical image processing; image resolution; table lookup; vegetation mapping; BRDF look-up table; LUT-based approach; angular corrected reflectance; angular effect correction; bi-directional reflectance distribution function; crop condition monitoring; cropland data layer; medium resolution sensors; narrow swath sensors; natural vegetations; remote sensing imagery; surface reflectance; wide swath sensors; Agriculture; Earth; MODIS; Reflectivity; Remote sensing; Satellites; Sensors; AWiFS; BRDF; Landsat; crop condition; directional reflectance; time-series analysis;
Conference_Titel :
Agro-Geoinformatics (Agro-Geoinformatics), 2013 Second International Conference on
Conference_Location :
Fairfax, VA
DOI :
10.1109/Argo-Geoinformatics.2013.6621925
