Products & Algorithms

Research Products & Algorithm

SGLI Research Products and Agorithm Theoretical Basis Documents (ATBD)
Area Product
[ID※1]		 Definition & Unit Proposer Last ATBD
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Land Land net primary production
[LNPP]
  • Def.: Net primary productivity which is how much carbon dioxide vegetation takes in during photosynthesis (GPP) minus how much carbon dioxide the plants release during respiration or decay.
  • Unit: gC/m2/year
 K.Ichii / K.Nasahara Sep. 2011 PDF
Water stress trend
[WST]
  • Def.: An index to understand the droughty state of vegetation.
  • Unit: none
 K.Nasahara TBD -
ET Index (Crop Coefficient)
[ETID]
  • Def.: actual evapotranspiration normalized for the weather condition
  • Unit: none
 M.Tasumi Feb. 2024 PDF
  • Data DL：JASMES
    		•
    Fire detection index
    [FDI]
    • Def.: Location of fire hot spots detected using thermal and shortwave infrared bands.
    • Unit: none
    		 K.Nakau Mar. 2015 PDF
    M.Moriyama Mar. 2017 PDF
    Y.Kurihara Jan. 2021 PDF
  • Data DL: JASMES
    		•
    Land cover type
    [LCT]
    • Def.: Land cover type classified using vegetation indices and land reflectance.
    • Unit: none
    		 K.Fukue Oct. 2011 PDF
    N.Soyama Oct. 2011 PDF
    Land surface albedo
    [LALB]
    • Def.: Ratio of upward reflected energy to downward solar radiation energy.
    • Unit: none
    		 J. Susaki Mar. 2022 PDF
    Leaf Sectral Property
    • Def.: Reflectance and transmittance of leaves
    • Unit: none
    		 K.Nasahara Sep. 2011 PDF
    Vegetation phenology（candidate）
    • Def.：Dates of leaf spread and leaf fall in each year in global
    • Unit: day
    		 W.Yang Feb. 2023 paper
  • Data DL: FTP
    		•
    Atmosphere Water cloud geometrical thickness
    [CLGT_W]
    • Def.: Geometrical thickness of water cloud.
    • Unit: m
    		 M.Kuji TBD -
    Long-wave radiation flux
    [LWRF]
    • Def.: Longwave radiation flux at the ground including downward longwave radiation flux and upward longwave radiation flux.
    • Unit: W/m2
    		 T.Hayasaka TBD -
    Short-wave radiation flux
    [SWRF]
    • Def.: Shortwave radiation flux at the ground including downward shortwave radiation flux and upward shortwave radiation flux.
    • Unit:W/m2
    		 T.Hayasaka TBD -
    Ocean Euphotic zone depth
    [EZD]
    • Def.: The sea depth where photosynthetic available radiation (PAR) is 1% of its surface value.
    • Unit:m
    		 T.Hirata Mar. 2017 PDF
    Inherent optical properties
    [IOP]
    • Def.: Optical properties of sea water such as spectral absorption, scattering, and backscattering coefficients for characterizing the marine optical environment and remote-sensing applications.
    • Unit:1/m
    		 T.Hirata Nov. 2011 PDF
    Ocean net primary productivity
    [ONPP]
    • Def.: Net primary productivity which is gross photosynthetic carbon fixation minus the carbon respired to support maintenance requirements of the whole plant.
    • Unit:mgC/m2/day
    		 T.Hirawake Mar. 2016 PDF
    J.Ishizaka Mar. 2011 PDF
    Phytoplankton functional type
    [PHFT]
    • Def.: Conceptual groupings of phytoplankton species, which have a ecological functionality in common such as nitrogen fixation, calci?cation, silici?cation, DMS production and so on.
    • Unit: none
    		 T.Hirata Mar. 2012 PDF
    T.Hirawake Mar. 2016 PDF
    Redtide
    [RTD]
    • Def.: Detection of a red tide phenomenon known as an algal bloom.
    • Unit: none
    		 J.Ishizaka Mar. 2011 PDF
    Multi sensor merged ocean color parameters
    • Def.: Multi-sensor merged chrollophyl-a concentration product with higher temporal resolution than that of SGLI original product.
    • Unit:mg/m3
    		 TBD - -
    Multi sensor merged sea surface temperature
    [MSST]
    • Def.: Multi-sensor merged seasurface temperature product with higher temporal resolution than that of SGLI original products.
    • Unit: ℃
    		 TBD - -
    Sea surface nitrate and nitrate based new production
    • Def.: Sea Surface Nitrate and Nitrate Based New Production.
    • Unit:TBD
    		 J. I. Goes Mar. 2017 PDF
    Floating Algae Index (FAI)
    • Def.: An index for floating algae on the sea surface derived from near-infrared reflectance
    • Unit: none
    		 H.Murakami Dec. 2019 PDF (ATBD of JASMES/SGLI near-real time data FAI)

    PDF (ATBD of JASMES/SGLI near-real time ocean color)
    Cryosphere Snow and ice classification
    [SIC]
    • Def.: Classification of snow and ice cover types derived using spectral reflectance and temperature.
    • Unit: none
    		 K.Stamnes Mar. 2016 PDF
    Snow area in forest and mountain
    [SCAFM]
    • Def.: The extent of snow cover in forest and mountaneous region.
    • Unit: none
    		 K.Stamnes Mar. 2016 PDF
    Snow grain size of subsurface layer
    [SNGSS]
    • Def.: Grain size of snow ice particle in sub-surface layer derived mainly from SGLI 1050nm band reflectance.
    • Unit: μm
    		 K.Stamnes Mar. 2016 PDF
    T.Aoki TBD -
    Snow grain size of top layer
    [SNGST]
    • Def.: Grain size of snow ice particle in top-surface layer derived mainly from SGLI 1640nm band reflectance.
    • Unit:μm
    		 K.Stamnes Mar. 2016 PDF
    T.Aoki TBD -
    Snow and ice albedo
    [SIALB]
    • Def.: Spectrally integrated albedo of snow surface.
    • Unit: none
    		 K.Stamnes TBD -
    T.Aoki TBD -
    Snow impurity
    [SNIP]
    • Def.: Mass fraction of snow impurity mixed in snow layer which is optically equivalent to soot.
    • Unit: ppmw
    		 K.Stamnes Mar. 2016 PDF
    Ice sheet surface roughness
    [ISRGH]
    • Def.: Surface roughness of ice sheets defined as the ratio of height to width of a roughness pattern.
    • Unit: none
    		 T.Aoki Oct. 2011 PDF
    Ice sheet boundary monitoring
    [ISBM]
    • Def.: Boundary line between ice sheets and sea surface.
    • Unit: none
    		 JAXA TBD -

    *1:Product ID of the research products written in [ ] are tentative.