| Model ID: | M00046 | ||||||
| Model Name: | Matrix-Douling model | ||||||
| Encoders: |
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| Key words: | Passive microwave. high-order radiative transfer solution. Matrix-Doubling | ||||||
| Model Type: | Empirical Model | ||||||
| Latest Modified: | |||||||
| Submission Date: | |||||||
| Abstract: | Matrix-Doubling (MD) algorithm is developed based on the ray-tracing technique, which accounts for multiple scattering inside the vegetation layer and that between vegetation and soil surface. To calculate the emissivity with this model, the vegetation is divided into N sub-layer that are assumed to be symmetrical with respect to the azimuth. | ||||||
| Equation: |
| 1 |
Name: frequency
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Parameter type: Double
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Physic Entity: simulated emitted frequency of vegetation
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| 2 |
Name: soil moisture
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Parameter type: Double
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Physic Entity: Description of soil moisture
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| 3 |
Name: Soil roughness standard
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Parameter type: Double
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Physic Entity: Description of soil roughness
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| 4 |
Name: Soil roughness average slope
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Parameter type: Double
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Physic Entity: Description of soil roughness
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| 5 |
Name: Canopy depth
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Parameter type: Double
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Physic Entity: Canopy depth, excluding stalk
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| 6 |
Name: Leaf radius
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Parameter type: Double
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Physic Entity: Statistically average radius of round leaf
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| 7 |
Name: Leaf thickness
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Parameter type: Double
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Physic Entity: Statistically average thickness of round leaf
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| 8 |
Name: Leaf density
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Parameter type: Double
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Physic Entity: Statistically average leaf number per unit
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| 9 |
Name: leaf moisture
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Parameter type: Double
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Physic Entity: Statistically average leaf moisture
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| 10 |
Name: Branch cross-section radius
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Parameter type: Double
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Physic Entity: Statistically average branch cross-section radius radius
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| 11 |
Name: Branch height
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Parameter type: Double
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Physic Entity: Statistically average branch height
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| 12 |
Name: Branch density
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Parameter type: Double
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Physic Entity: Statistically average branch number per unit
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| 13 |
Name: Branch moisture
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Parameter type: Double
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Physic Entity: Statistically average
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| 14 |
Name: trunk cross-section radius
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Parameter type: Double
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Physic Entity: Statistically average trunk cross-section radius radius
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| 15 |
Name: trunk height
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Parameter type: Double
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Physic Entity: Statistically average trunk height
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| 16 |
Name: trunk density
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Parameter type: Double
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Physic Entity: Statistically average trunk number per unit
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| 17 |
Name: trunk moisture
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Parameter type: Double
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Physic Entity: Statistically average
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| 18 |
Name: Simulated V polarization emissivity
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Parameter type: Double
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Physic Entity: The result, V polarization emissivity
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| 19 |
Name: Simulated H polarization emissivity
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Parameter type: Double
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Physic Entity: The result, H polarization emissivity
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| Title: | Passive Microwave Remote Sensing of Forests: A Model Investigation | ||||||
| Authors: |
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| Cited by: | IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 1996 | ||||||
| Abstract: | A model, based on the radiative transfer theory and the matrix doubling algorithm, is described and used to compute the emissivity e of forests. According to model simulations, the L-band emissivity trend versus forest biomass is more gradual than that of the backscatter coefficient. This gradual behavior is observed, in absence of leaves, also at C- and X-bands, while leaves anticipate saturation and make e higher in coniferous forests and lower in deciduous forests. Model results are successfully validated by some available experimental data. Operational aspects, concerning the potential of airborne and spaceborne radiometers in identifying forest type and estimating biomass, are discussed |
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