| Title | Presenting a web based evaluation tool to interactively explore the relationship between observed bi-directional reflectance and canopy characteristics |
| |
| Author | White, H P ;
Dickinson, H; Trebble, A; Alföldi, T |
| Source | Proceedings of the 26th Canadian Symposium on Remote Sensing; 2005, 5 pages |
| Image |  |
| Year | 2005 |
| Alt Series | Earth Sciences Sector, Contribution Series 2005224 |
| Meeting | 26th Canadian Symposium on Remote Sensing; Wolfville, NS; CA; June 14-16, 2005 |
| Document | book |
| Lang. | English |
| Media | paper |
| Subjects | geophysics; remote sensing; reflectance; reflection studies; satellites; satellite imagery |
| Illustrations | screen captures; plots |
| Program | Geomatics for Sustainable Development of Natural
Resources |
| Released | 2005 01 01 |
| Abstract | In recent years, the quantitative assessment of vegetation properties for environmental monitoring has significantly improved due to advances in spaceborne high-resolution imaging spectrometers
(hyperspectral imagery) and canopy radiative transfer algorithms. Such progress supports efforts to better assess environmental change, useful for applications such as evaluating environmental impacts of mining operations and rehabilitation efforts
around mines. This capability to quantitatively monitor change is further supported by increased satellite re-visits by acquiring scenes at off-nadir viewing geometries (i.e., by rolling the satellite to view eastward or westward of its orbital
track) and by obtaining acquisitions from more than one sensor. Successful utilization of this increased volume and complexity of observations requires a basic understanding of how varying view/illumination conditions affect the observed at-surface
reflectance (the bidirectional reflectance factor, or BRF).
FLAIR (Four-scale Linear model for AnIsotropic Reflectance) is a canopy radiative transfer model useful in demonstrating canopy BRF. This model has been incorporated into a Web-based tool
developed at the Canada Centre for Remote Sensing, Natural Resources Canada. When a user alters canopy architectural properties, component reflectance, and view/sun orientations, the FLAIR web demonstration tool (FLAIR-Web) outputs charts and data
plots that illustrate the effects of these variables on the observed BRF. FLAIR-Web exploits two contributions of hyperspectral remote sensing systems: 1) Manoeuvrability for frequent target re-visit resulting in a
range of off-nadir view
orientations; and 2) An array of proposed space borne sensors providing scene re-visits covering a range of solar illumination conditions. |
| GEOSCAN ID | 220975 |
|
|