Name
Title | ||
|---|---|---|
Using 1-D Models to Interpret the Reflectance Anisotropy of 3-D Canopy Targets: Issues and Caveats |
Abstract | ||
|---|---|---|
Abstract—This paper evaluates 1) to what extent one-dimen- sional (1-D) models can be used to represent the magnitude and directionality of the surface reflectance field of heterogeneous canopy targets at different spatial resolutions, and 2) whether this usage results in significant biases in the estimation of the corresponding state variables. It will be seen that when both the 1-D and three-dimensional (3-D) models account for all features of the measured radiation field, then—in the absence of further information regarding the nature and structure of the target—the use of a 3-D model may amount to an over-interpretation of the available data. The simplified surface structure formulation contained within the 1-D model, on the other hand, may affect the values of the state variables that such models will retrieve. This is because the shape of the reflectance anisotropy of the 3-D target is almost always different from that of a structurally homogeneous (1-D) canopy with the same state variable values but no foliage clumping. By consequence the 1-D canopies that are capable of mimicking the bell (or bowl) shaped reflectance anisotropy of 3-D targets will tend to feature lower leaf area index, higher soil albedo and, in particular, predominantly erectophile (or plagiophile) leaf normal distributions. Index Terms—Bidirectional reflectance function (BRF) shape, |
Year | DOI | Venue |
|---|---|---|
2005 | 10.1109/TGRS.2005.853718 | Geoscience and Remote Sensing, IEEE Transactions |
Keywords | Field | DocType |
atmospheric boundary layer,terrain mapping,vegetation mapping,3d canopy structure,bidirectional reflectance function shape,erectophile leaf normal distributions,heterogeneous canopy,leaf area index,multiangular reflectance data,pixel-based inversion,reflectance anisotropy,soil albedo,spatial resolutions,surface reflectance field,bidirectional reflectance function (brf) shape,one-dimensional (1-d) models,three-dimensional (3-d) canopy structure,three dimensional,spatial resolution,normal distribution,surface structure | Magnitude (mathematics),Leaf area index,Normal distribution,Anisotropy,Remote sensing,Albedo,State variable,Planetary boundary layer,Mathematics,Canopy | Journal |
Volume | Issue | ISSN |
43 | 9 | 0196-2892 |
Citations | PageRank | References |
7 | 1.56 | 8 |
Authors | ||
5 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Jean-Luc Widlowski | 1 | 8 | 2.40 |
| B. Pinty | 2 | 117 | 32.67 |
| Thomas Lavergne | 3 | 10 | 2.35 |
| Michel Max Verstraete | 4 | 7 | 1.56 |
| Nadine Gobron | 5 | 45 | 10.85 |