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Relating forest biomass to TanDEM-X mean phase height

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Názov: Relating forest biomass to TanDEM-X mean phase height
Autori: Askne, Jan, 1936
Zdroj: IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. 18:24039-24050
Predmety: TanDEM-X, Above-ground biomass, interferometric synthetic aperture radar, boreal forest, forest height, forest structure
Popis: The Copernicus DEM is derived as a mean of TanDEM-X phase heights. It is known that there is an almost linear - but variable - relationship between phase height and above ground biomass (AGB). This paper investigates the relationship between the mean of TanDEM-X phase heights and AGB. The slope between TanDEM-X phase height and AGB varies across different acquisitions from the same site, influenced by meteorological conditions and the height of ambiguity (HoA), which is the height corresponding to a 2π phase shift. An expression based on the Interferometric Water Cloud Model (IWCM) is introduced to represent an average of meteorological variations. This approach uses an ICESat-based method to describe the relationship between area-fill (canopy cover) and forest height. The product of density and height is shown to be approximately linear with AGB under certain conditions. This enables us to express mean phase height as a function of AGB, provided that either the AGB-height allometry or reference AGB values from field data are known. The results demonstrate a strong resemblance and near-linear relationship between mean phase height, mean forest height, and AGB across a wide range of conditions. The analysis is illustrated with 32 TanDEM-X acquisitions from the Remningstorp and Krycklan sites. Forest height and area-fill are estimated from mean phase height, and AGB is also derived for these sites.
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Prístupová URL adresa: https://research.chalmers.se/publication/548243
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  Data: Relating forest biomass to TanDEM-X mean phase height
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Askne%2C+Jan%22">Askne, Jan</searchLink>, 1936
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  Data: <i>IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing</i>. 18:24039-24050
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  Data: <searchLink fieldCode="DE" term="%22TanDEM-X%22">TanDEM-X</searchLink><br /><searchLink fieldCode="DE" term="%22Above-ground+biomass%22">Above-ground biomass</searchLink><br /><searchLink fieldCode="DE" term="%22interferometric+synthetic+aperture+radar%22">interferometric synthetic aperture radar</searchLink><br /><searchLink fieldCode="DE" term="%22boreal+forest%22">boreal forest</searchLink><br /><searchLink fieldCode="DE" term="%22forest+height%22">forest height</searchLink><br /><searchLink fieldCode="DE" term="%22forest+structure%22">forest structure</searchLink>
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  Label: Description
  Group: Ab
  Data: The Copernicus DEM is derived as a mean of TanDEM-X phase heights. It is known that there is an almost linear - but variable - relationship between phase height and above ground biomass (AGB). This paper investigates the relationship between the mean of TanDEM-X phase heights and AGB. The slope between TanDEM-X phase height and AGB varies across different acquisitions from the same site, influenced by meteorological conditions and the height of ambiguity (HoA), which is the height corresponding to a 2π phase shift. An expression based on the Interferometric Water Cloud Model (IWCM) is introduced to represent an average of meteorological variations. This approach uses an ICESat-based method to describe the relationship between area-fill (canopy cover) and forest height. The product of density and height is shown to be approximately linear with AGB under certain conditions. This enables us to express mean phase height as a function of AGB, provided that either the AGB-height allometry or reference AGB values from field data are known. The results demonstrate a strong resemblance and near-linear relationship between mean phase height, mean forest height, and AGB across a wide range of conditions. The analysis is illustrated with 32 TanDEM-X acquisitions from the Remningstorp and Krycklan sites. Forest height and area-fill are estimated from mean phase height, and AGB is also derived for these sites.
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        Value: 10.1109/JSTARS.2025.3606791
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      – Text: English
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        PageCount: 12
        StartPage: 24039
    Subjects:
      – SubjectFull: TanDEM-X
        Type: general
      – SubjectFull: Above-ground biomass
        Type: general
      – SubjectFull: interferometric synthetic aperture radar
        Type: general
      – SubjectFull: boreal forest
        Type: general
      – SubjectFull: forest height
        Type: general
      – SubjectFull: forest structure
        Type: general
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      – TitleFull: Relating forest biomass to TanDEM-X mean phase height
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              Y: 2025
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            – TitleFull: IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
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