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Product information / operation

Information about products and their operation is provided by spacecraft.

Satellite/Sensor information

For operational information of GCOM-C/SGLI, the following documents will be posted at the same time as product release.
  • Orbit Control Information : Event information on satellite operation (track control information, proof maneuver information etc.) will be posted.

  • SGLI Data Loss Information : Data loss information on observation data will be posted.



  • GCOM-C Observation plan

    The Observation plan of GCOM-C will be listed below at the same time as product release.


    GCOM-C Orbital Elements

    The orbital elements of GCOM-C will be listed below in the Two-Line Element(TLE) format.
    Please refer this page which includes the file name information.
    The information will be posted at the same time as product release.


    Product Description

    This service calculates and provides the following geophysical parameters from the observation data as standard products.

  • Product Level
  • Geophysical Parameters
  • Granule ID
  • Product Version History
  • Reprocess Schedule



  • Product Level

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    Geophysical Parameters


    *1 Product ID of Leve-2 product is written in [ ] and Level-3 is written in ( ).
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    Granule ID

    Please refer to section 4.1.3.3 (L1 product) and 4.1.4.2(L2 & L3 product) of GCOM-C Data Users Handbook to get the Granule ID format information.
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    Product Version History

    GCOM-C/SGLI product version history will be posted at the same time as product release.
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    Reprocess Schedule

    Reprocess schedule of GCOM-C/SGLI product will be posted at the same time as product release.
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    [ATBD]
    https://suzaku.eorc.jaxa.jp/GCOM_C/data/product_std.html
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    Satellite/Sensor information

    For operational information of GCOM-W1 and AMSR2, please refer to the following PDF.
  • Orbit Control Information (Event List)
  • AMSR2 Missing Line Information (Fair Data List)
  • AMSR2 Data Loss Information (Missing Data List)


  • GCOM-W1 Orbital Elements

    The orbital elements of GCOM-W1 are listed below in the Two-Line Element(TLE) format.

    File name definition : NNNNNNYYYYMMDDHHmmss

    NNNNNN = W1TLEN or W1TLE0 (*) , YYYYMMDDHHmmss = file creation time
    (*)Normally, please use W1TLEN because W1TLE0 does not consider the orbital maneuver for orbit calculation.


    Select data to download.

    NameSize(KB)

    W1TLEN201812160910210.14
    W1TLEN201812150910210.14
    W1TLEN201812140910200.14
    W1TLEN201812130910210.14
    W1TLEN201812120910200.14
    W1TLEN201812110910200.14
    W1TLEN201812100910210.14

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    Product Description

    This service calculates and provides the following geophysical parameters from the observation data as standard products.

  • Product Level
  • Geophysical Parameters
  • Product Version History

  • Product Level

    Product
    Level
    ContentsDescription
    1AUncorrected
    The product that contains the count value, variable coefficient for radiometric correction, geometry information corresponding to each observation point (observation position, solar angle, observation direction, etc.), and supplementary information of uncorrected observation data.
    1BBrightness TemperatureThe product that contains the converted data from level 1A data, converting observation data into brightness temperature using radiometric correction, and supplementary information same as L1A.
    1RBrightness Temperature
    (Resampling)
    The product that contains the converted data from level 1B product, adapting the resolution of each frequency and processing altitude correction.
    2Physical Parameters
    (Scene)
    The product that contains the converted data from level 1B or 1R product, calculating physical parameters about water (Total Precipitable Water, Cloud Liquid Water, Precipitation, Sea Surface Wind speed, Sea Surface Temperature, Sea Ice Concentration, Snow Depth, Soil Moisture Content), and supplementary information.
    3Physical Parameters
    (Global Data)
    The product that contains converted data from level 2 product, including previously defined global grid, observation data of daily or monthly average, and the supplementary information.

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    Geophysical Parameters

    AreaPhysical ParametersDescription
    AtmosphereTotal Precipitable WaterAmount of vertically accumulated water vapor (H2O in gaseous state) in the atmosphere, and defined as amount of water per unit area. Coverage of the product is over the ocean only, and unit is [kg/m2]. Total precipitable water is one of essential hydrological parameters describing state of the atmosphere along with precipitation and cloud liquid water.
    Cloud Liquid WaterAmount of vertically accumulated cloud droplet in the atmosphere, and defined as amount of water per unit area. Coverage of the product is over the ocean only, and unit is [kg/m2]. Cloud liquid water is one of essential hydrological parameters describing state of the atmosphere along with precipitation and total precipitable water.
    PrecipitationAlthough "precipitation" is usually defined as amount of water, which reaches the surface of the earth from atmosphere as rain and/or snow, microwave imager's precipitation products provide amount of rain (surface rainfall). Coverage of the product is global, and unit is [mm/hr]. Accuracy of rainfall estimate over land, however, tends to be lower than that over the ocean. Method of rainfall estimate used in AMSR2 precipitation product is also applied to "Global Rainfall Watch" system, which distributes global rainfall map in near-real-time.
    OceanSea Surface TemperatureTemperature of water at ocean surface. Coverage of the product is over the ocean only, and unit is [°C]. Its horizontal resolution is about 20-30 km and coarser than that of optical instruments. Microwave radiometer, however, can observe ocean surface through clouds, and monitor continuous change of sea surface temperature over the ocean where few clear region can be found in specific areas or seasons.
    Sea Surface Wind speedWind speed above the ocean surface. Coverage of the product is over the ocean only, and unit is [m/s]. Microwave radiometer can observe wind speed under the clouds, but it is difficult to estimate where there is rainfall and will be missing value. Wind speed around tropical cyclones, however, is important parameter in weather forecast, and we provide research product, which includes wind speed in rainy area over the ocean, as all-weather wind speed research product.
    CryosphereSea Ice ConcentrationPercentage of sea ice coverage within target ocean area. Coverage of the product is over the ocean around Arctic and Antarctic Sea, and unit is [%]. There is no sea ice within pixel area when sea ice concentration is 0%, and all pixel area is covered by sea ice when it shows 100%. We can learn distribution of sea ice immediately using this product, and it become more and more important because of recent decrease of Arctic sea ice cover.
    Land AreaSnow DepthDepth of snow cover over land surface. Coverage of the product is over land only, and unit is [cm]. We do not provide snow cover over the sea ice surface. Snow depth parameter is closely related to climate variation, and this product enables us to figure out changes in distribution of global snow cover.
    Soil Moisture ContentAmount of soil wetness near the ground surface as volume water content. Coverage of the product is over land only, and unit is [%]. Soil moisture cannot be estimated near the coast, around big lakes and marshes, or areas with wide spread dense forests. Since microwave radiometer can get data constantly and frequently, this product is used in monitoring of large-scale cultivation areas in the continents.

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  • Product Information
  • [NOTICE] Please read the caveats before using product. DPR data missing list is available from operation status below. 

  • Operation Status (Missing Data List, Maneuver History and Operation Mode history)
  • [NOTICE] Please open it by a spreadsheet application such as MS EXCEL. 
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    Please read the caveats in Algorithm and Product Information page before using product. 

    Maneuver History

    Missing Data List

    Satellite Information

    See  Satellite Information other than above.


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    GSMaP Website "JAXA Global rainfall Watch"

    The website for monitoring GSMaP.
  • https://sharaku.eorc.jaxa.jp/GSMaP/index.htm



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    G-Portal provides the various helpful information,
    Operational Information, for our spacecraft and sensors,
    please check the below before search or retrieve our products.
     
    Maneuver HistoryThese are the history of controlling the satellite, delta V maneuver which are increased or decreased speed of spacecraft, the yaw-around maneuver which are rotated 180 degrees for keeping the Sun off the +Y side of spacecraft, and so on.
    Orbital ElementsThis orbital information indicates spacecraft position with 6 orbit elements. (Ex; Two-Line-Elements)
    Lost Data or Missing Data ListThese lists are the failure of getting data, lost data or missing data due to fail by some reason, for example, spacecraft orbit control, sensor calibration and so on.
    Operation Mode historyThese indicates the status change of each Spacecraft Operational Mode.(Ex; Observation,Stand-by, Calibration, Memory dump, and so on).
     Each spacecraft provides their orbital information respectively. 


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