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Atmospheric and science complexity effects on surface bidirectional reflectance
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hessom, C. Martonchik, J. V. Sythe, W. D. |
| Copyright Year | 1985 |
| Description | Among the tools used in passive remote sensing of Earth resources in the visible and near-infrared spectral regions are measurements of spectral signature and bidirectional reflectance functions (BDRFs). Determination of surface properties using these observables is complicated by a number of factors, including: (1) mixing of surface components, such as soil and vegetation, (2) multiple reflections of radiation due to complex geometry, such as in crop canopies, and (3) atmospheric effects. In order to bridge the diversity in these different approaches, there is a need for a fundamental physical understanding of the influence of the various effects and a quantiative measure of their relative importance. In particular, we consider scene complexity effects using the example of reflection by vegetative surfaces. The interaction of sunlight with a crop canopy and interpretation of the spectral and angular dependence of the emergent radiation is basically a multidimensional radiative transfer problem. The complex canopy geometry, underlying soil cover, and presence of diffuse as well as collimated illumination will modify the reflectance characteristics of the canopy relative to those of the individual elements. |
| File Size | 6239571 |
| Page Count | 7 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19860004334 |
| Archival Resource Key | ark:/13960/t4pk58f5d |
| Language | English |
| Publisher Date | 1985-09-01 |
| Access Restriction | Open |
| Subject Keyword | Earth Resources And Remote Sensing Atmospheric Effects Earth Resources Program Canopies Vegetation Spectral Signatures Earth Resources Bidirectional Reflectance Collimation Earth Surface Remote Sensing Complexity Directivity Scene Analysis Angular Distribution Diffusion Radiative Heat Transfer Illuminance Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
