A microwave polarimetric scattering model for forest canopies based on vector radiative transfer theory

Karam, M.A.; Amar, F.; Fung, A.K.; Mougin, E.; Lopès, A.; Vine, David M. Le; Beaudoin, A.

doi:10.1016/0034-4257(95)00048-6

Cited by 104 publications

(35 citation statements)

References 16 publications

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“…In this research, the cross-polarization behavior was in line to the model and also similar to previous research using dual polarization [Avtar et al, 2011]. Specifically in HH polarization, this research confirmed Avtar et al [2011] findings where rubber plantation exposed a slightly longer dynamic range (about 7 dB) than the one modeled by Karam et al [1995], i.e. 5 dB.…”

Section: Resultssupporting

confidence: 90%

“…Point of saturation for rubber stands appears similar to the general model developed for mixed broadleaf forests [Karam et al, 1995]. Based on dual polarization HH+HV, Avtar et al [2011] indicated the similar level of saturation.…”

Section: Resultssupporting

confidence: 72%

“…These findings suggested that rubber exhibits sufficiently great dynamic range and therefore backscatter coefficients may have potential for rubber stands identification and biophysical assessments, especially in early growths. According to Karam et al, [1995] model, which was also confirmed by Rosenqvist [1996], mechanisms related to surface roughness, local topography and ground vegetation (especially the existence and thickness of cover crop) gave substantial influence to backscatter coefficients in juvenile trees. Branches in young plants are responsible for single-bounce scattering, while double-bounce is due to the existence of ground-trunk interaction with incoming waves [Karam et al, 1995].…”

Section: Resultsmentioning

confidence: 61%

“…According to Karam et al, [1995] model, which was also confirmed by Rosenqvist [1996], mechanisms related to surface roughness, local topography and ground vegetation (especially the existence and thickness of cover crop) gave substantial influence to backscatter coefficients in juvenile trees. Branches in young plants are responsible for single-bounce scattering, while double-bounce is due to the existence of ground-trunk interaction with incoming waves [Karam et al, 1995]. When rubber tree grows and reaches their maturity, contribution of soil backgrounds weakens and total backscatter in all polarization is then dominated by returning waves from trunks and branches.…”

Section: Resultsmentioning

confidence: 61%

“…Vector radiative transfer modeling suggested that copolarization channels have a shorter dynamic range [Karam et al, 1995]. They found that dynamic range of cross polarization was about 9 dB, in contrast to copolarization with only about 4 -5 dB.…”

Section: Resultsmentioning

confidence: 99%

See 4 more Smart Citations

Mapping stand age of rubber plantation using ALOS-2 polarimetric SAR data

Trisasongko

2017

European Journal of Remote Sensing

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This paper presents an evaluation on strategies for rubber plantation mapping employing SAR data coupled with Random Forest (RF) and Support Vector Machine (SVM). Linear backscatter coefficients achieved saturation point at about 10 years, making this form of polarimetric data being robust only for young to mature stands. This research found that the performance of both algorithms was comparable. The addition of texture features gave substantial impact to the overall accuracy. As indicated by the analysis of variable importance, only some texture features have contributed to higher overall accuracy. Classification using a subset of texture features pointed out that accuracy could be improved using dual polarimetric data, while trivial enhancement was seen in combined HH, HV and VV backscatter intensities. The research showed that classification accuracy could be further augmented by setting proper classification parameters. Nonetheless, it is argued that the level of improvement would greatly depend on selecting a proper dataset fed into classifier, rather than tuning classifier parameters. ARTICLE HISTORY

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Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 72%

Section: Resultsmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 99%

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Mapping stand age of rubber plantation using ALOS-2 polarimetric SAR data

Trisasongko

2017

European Journal of Remote Sensing

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Mapping Stand Age of Indonesian Rubber Plantation Using Fully Polarimetric L ‐Band Synthetic Aperture Radar

Trisasongko

2021

Advances in Remote Sensing for Natural Resource Monitoring

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The potential of L‐band SAR for quantifying mangrove characteristics and change: case studies from the tropics

Lucas¹,

Mitchell²,

Rosenqvist³

et al. 2007

Aquatic Conservation

135

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Lucas, R. M., Mitchell, A. L., Rosenqvist, A., Christophe, P., Melius, A., Ticehurst, C. (2007). The potential of L-band SAR for quantifying mangrove characteristics and change: case studies from the tropics. Aquatic Conservation-Marine and Freshwater Ecosystems, 17, 245-264. Sponsorship: Environmental Research Institute of the Supervising Scientist (ERISS)1. The Japan Aerospace Exploration Agency's (JAXA) Advanced Land Observing Satellite (ALOS) L-band Phased Array Synthetic Aperture Radar (PALSAR), launched successfully in January 2006, will provide new data sets for coastal ecosystems mapping and change monitoring at local to global scales. 2. To evaluate L-band capability for mangrove applications, data acquired by the NASA airborne SAR (AIRSAR) and Japanese Earth Resources Satellite (JERS-1 SAR) over sites in Australia, French Guiana and Malaysia were used to demonstrate benefits for mapping extent and zones, retrieving biomass and structural attributes (e.g. height), and detecting change. 3. The research indicates that mapping is most effective where mangroves border non-forested areas and where differences in structure, as a function of species, growth stage and biomass distributions, occur between zones. 4. Using L-band SAR, biomass can be retrieved up to ?100?140 Mg ha?1, although retrieval is complicated by a noticeable decrease in L-band backscattering coefficient within higher (?>200 Mg ha?1) biomass stands, particularly those with extensive prop root systems. 5. Change detection through multi-temporal comparison of data proved useful for mapping deforestation/regeneration and mangrove dynamics associated with changing patterns of sedimentation. 6. The research highlights the likely benefits and limitations of using ALOS PALSAR data and supports JAXA's Kyoto & Carbon (K&C) Initiative in promoting the use of these data for regional mangrove assessment.Peer reviewe

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A microwave polarimetric scattering model for forest canopies based on vector radiative transfer theory

Cited by 104 publications

References 16 publications

Mapping stand age of rubber plantation using ALOS-2 polarimetric SAR data

Mapping stand age of rubber plantation using ALOS-2 polarimetric SAR data

Mapping Stand Age of Indonesian Rubber Plantation Using Fully Polarimetric L ‐Band Synthetic Aperture Radar

The potential of L‐band SAR for quantifying mangrove characteristics and change: case studies from the tropics

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