System Maintenance:
There may be intermittent impact on performance while updates are in progress. We apologize for the inconvenience.
By Topic

The effect of small topographic variations on reflectance

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Combal, B. ; INRA-Unite Climat-Sol-Environnement, Avignon, France ; Isaka, H.

The influence of topography on the bidirectional reflectance factors (BRFs) of vegetation canopies is commonly neglected when retrieving canopy parameters by inversion of reflectance models. However, the nonlinear dependence of vegetation BRFs on slope magnitude and orientation means that topography cannot necessarily be assumed to have an insignificant effect, even when slopes are small. The study presented here shows that, at a Sun zenith angle of 60°, the reflectance of a set of terrain elements may differ from that of horizontal terrain by more than 10% at forward scattering directions for slopes of 10° or less. The errors may also be strongly correlated to observation conditions, which raises questions about using least squares minimization schemes to find the best fit between measured and modeled reflectance data

Published in:

Geoscience and Remote Sensing, IEEE Transactions on  (Volume:40 ,  Issue: 3 )