Exploring vegetation profiles from TanDEM-X phase, lidar, and field measurements in tropical forests
This paper explores the hypothesis that few-look phases from TanDEM-X have information about the vegetation profile over 50 × 50 m stands in tropical moist forests in Brazil. The formalism for modeling the interferometric phase of interferometric SAR (InSAR) is examined before taking the look, or en...
| Autor principal: | Treuhaft, Robert N. |
|---|---|
| Outros Autores: | Gonçalves, Fábio Guimarães, Santos, João Roberto dos, Palace, Michael W., Keller, Michael, Madsen, Søren Nørvang, Sullivan, Franklin B., Graça, Paulo Maurício Lima Alencastro de |
| Grau: | Trabalho Apresentado em Evento |
| Idioma: | English |
| Publicado em: |
Proceedings of the European Conference on Synthetic Aperture Radar, EUSAR
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/20022 |
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oai:repositorio:1-20022 |
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oai:repositorio:1-20022 Exploring vegetation profiles from TanDEM-X phase, lidar, and field measurements in tropical forests Treuhaft, Robert N. Gonçalves, Fábio Guimarães Santos, João Roberto dos Palace, Michael W. Keller, Michael Madsen, Søren Nørvang Sullivan, Franklin B. Graça, Paulo Maurício Lima Alencastro de Forestry Graphic Methods Interferometry Optical Radar Radar Vegetation Ensemble Averages Field Measurement Interferometric Phase Interferometric Sar Observation Period Tropical Moist Forest Vegetation Density Vegetation Profiles Synthetic Aperture Radar This paper explores the hypothesis that few-look phases from TanDEM-X have information about the vegetation profile over 50 × 50 m stands in tropical moist forests in Brazil. The formalism for modeling the interferometric phase of interferometric SAR (InSAR) is examined before taking the look, or ensemble average. It is suggested that it is the look averaging that produces the Fourier transform of the radar power profile in InSAR. Before the look averaging, a histogram of InSAR phases seems related to the radar power profile, which, in turn, is related to vegetation density. After a qualitative argument about the information in the few-look phases, 2-look phase histograms are shown along with lidar waveform profiles and modeled field profiles. It is observed that, for taller stands, TanDEM-X profiles are narrower than lidar and field profiles, suggesting less penetration. There is some suggestion that lidar ground finding needs honing and/or there has been disturbance over the observation period between 2010 and 2012. © VDE VERLAG GMBH · Berlin · Offenbach, Germany. 2020-06-16T17:31:44Z 2020-06-16T17:31:44Z 2014 Trabalho Apresentado em Evento https://repositorio.inpa.gov.br/handle/1/20022 en Volume Proceedings of the European Conference on Synthetic Aperture Radar, EUSAR, Pags. 874-876 Restrito Proceedings of the European Conference on Synthetic Aperture Radar, EUSAR |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Forestry Graphic Methods Interferometry Optical Radar Radar Vegetation Ensemble Averages Field Measurement Interferometric Phase Interferometric Sar Observation Period Tropical Moist Forest Vegetation Density Vegetation Profiles Synthetic Aperture Radar |
| spellingShingle |
Forestry Graphic Methods Interferometry Optical Radar Radar Vegetation Ensemble Averages Field Measurement Interferometric Phase Interferometric Sar Observation Period Tropical Moist Forest Vegetation Density Vegetation Profiles Synthetic Aperture Radar Treuhaft, Robert N. Exploring vegetation profiles from TanDEM-X phase, lidar, and field measurements in tropical forests |
| topic_facet |
Forestry Graphic Methods Interferometry Optical Radar Radar Vegetation Ensemble Averages Field Measurement Interferometric Phase Interferometric Sar Observation Period Tropical Moist Forest Vegetation Density Vegetation Profiles Synthetic Aperture Radar |
| description |
This paper explores the hypothesis that few-look phases from TanDEM-X have information about the vegetation profile over 50 × 50 m stands in tropical moist forests in Brazil. The formalism for modeling the interferometric phase of interferometric SAR (InSAR) is examined before taking the look, or ensemble average. It is suggested that it is the look averaging that produces the Fourier transform of the radar power profile in InSAR. Before the look averaging, a histogram of InSAR phases seems related to the radar power profile, which, in turn, is related to vegetation density. After a qualitative argument about the information in the few-look phases, 2-look phase histograms are shown along with lidar waveform profiles and modeled field profiles. It is observed that, for taller stands, TanDEM-X profiles are narrower than lidar and field profiles, suggesting less penetration. There is some suggestion that lidar ground finding needs honing and/or there has been disturbance over the observation period between 2010 and 2012. © VDE VERLAG GMBH · Berlin · Offenbach, Germany. |
| format |
Trabalho Apresentado em Evento |
| author |
Treuhaft, Robert N. |
| author2 |
Gonçalves, Fábio Guimarães Santos, João Roberto dos Palace, Michael W. Keller, Michael Madsen, Søren Nørvang Sullivan, Franklin B. Graça, Paulo Maurício Lima Alencastro de |
| author2Str |
Gonçalves, Fábio Guimarães Santos, João Roberto dos Palace, Michael W. Keller, Michael Madsen, Søren Nørvang Sullivan, Franklin B. Graça, Paulo Maurício Lima Alencastro de |
| title |
Exploring vegetation profiles from TanDEM-X phase, lidar, and field measurements in tropical forests |
| title_short |
Exploring vegetation profiles from TanDEM-X phase, lidar, and field measurements in tropical forests |
| title_full |
Exploring vegetation profiles from TanDEM-X phase, lidar, and field measurements in tropical forests |
| title_fullStr |
Exploring vegetation profiles from TanDEM-X phase, lidar, and field measurements in tropical forests |
| title_full_unstemmed |
Exploring vegetation profiles from TanDEM-X phase, lidar, and field measurements in tropical forests |
| title_sort |
exploring vegetation profiles from tandem-x phase, lidar, and field measurements in tropical forests |
| publisher |
Proceedings of the European Conference on Synthetic Aperture Radar, EUSAR |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/20022 |
| _version_ |
1787142779066908672 |
| score |
11.755432 |