Estimating the fraction of absorbed photosynthetically active radiation (f/sub APAR/) from off-nadir airborne measurements

E.C Brown De Colstoun,C.A Russell,C.L Walthall,J.R Irons

doi:10.1109/igarss.1994.399578

Estimating the fraction of absorbed photosynthetically active radiation (f/sub APAR/) from off-nadir airborne measurements

E.C Brown De Colstoun, C.A Russell + Show 2 more

https://doi.org/10.1109/igarss.1994.399578

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Publication Date: Aug 8, 1994

Affiliation: University of Maryland, College Park

#Advanced Solid-state Array Spectroradiometer #International Satellite Land Surface Climatology Project + Show 8 more

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Abstract

Following suggestions to use the bidirectional domain of remote sensing as a means to reduce the variability in the relationship between f/sub APAR/ and spectral vegetation indices (SVIs), the authors investigated the effect of estimating f/sub APAR/ 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 f/sub APAR/ 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. >

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