Title :
Estimating the fraction of absorbed photosynthetically active radiation (fAPAR) from off-nadir airborne measurements
Author :
De Colstoun, Eric C Brown ; Walthall, Charles L. ; Russell, Carol A. ; Irons, James R.
Author_Institution :
Dept. of Geogr., Maryland Univ., College Park, MD, USA
Abstract :
Following suggestions to use the bidirectional domain of remote sensing as a means to reduce the variability in the relationship between fAPAR and spectral vegetation indices (SVIs), the authors investigated the effect of estimating fAPAR from off-nadir airborne measurements acquired by the Advanced Solid-state Array Spectroradiometer (ASAS) during the First International Satellite Land Surface Climatology Project (ISLSCP) Field Experiment (FIFE) in Kansas. They examined two techniques to estimate fAPAR using atmospherically corrected data. One utilized the normalized difference vegetation index (NDVI) and simple ratio (SR) and the second made use of linear combinations of red and NIR reflectances
Keywords :
agriculture; geophysical techniques; infrared imaging; remote sensing; APAR; ASAS; Advanced Solid-state Array Spectroradiometer; FIFE; ISLSCP; NDVI; PAR; SVI; United States USA; absorbed photosynthetically active radiation; agriculture crops Kansas; bidirectional domain; geophysical measurement technique; land surface; light visible; normalized difference vegetation index; off-nadir airborne measurement; red infrared reflectance; remote sensing; simple ratio; spectral vegetation indices; vegetation mapping; Atmospheric measurements; Crops; Educational institutions; Geography; Iron; Laboratories; Remote sensing; Spectroradiometers; State estimation; Vegetation;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1994. IGARSS '94. Surface and Atmospheric Remote Sensing: Technologies, Data Analysis and Interpretation., International
Conference_Location :
Pasadena, CA
Print_ISBN :
0-7803-1497-2
DOI :
10.1109/IGARSS.1994.399578
