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The cause of the hot spot in vegetation canopies and soils: shadow-hiding versus coherent backscatter
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Smythe, William Nelson, Robert Hapke, Bruce DiMucci, Dominick |
| Copyright Year | 1996 |
| Description | Two different mechanisms, shadow-hiding and coherent backscatter, can cause a hot spot, or opposition effect, in the bidirectional reflectance of vegetation and soils. Because the two mechanisms sample different properties, it is important to know which one is primarily responsible in a given medium. This question can be answered by measuring the bidirectional reflectance in circularly polarized light. If the results of the limited experiments reported here can be extrapolated to a wider range of materials, it appears that the primary cause of the hot spot in most vegetation canopies and in moist, clumpy soils is shadow-hiding. However, in vegetation with large numbers of wavelength-sized structures, such as mosses, and in dry, fine-grained soils, the hot spot is dominated by coherent backscatter. |
| File Size | 503294 |
| Page Count | 6 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19970021464 |
| Archival Resource Key | ark:/13960/t3pw1f30w |
| Language | English |
| Publisher Date | 1996-01-01 |
| Access Restriction | Open |
| Subject Keyword | Earth Resources And Remote Sensing Shadows Soils Canopies Vegetation Backscattering Vegetation Bidirectional Reflectance Experimentation Bryophytes Coherent Scattering Polarized Light Drying Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
