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The user is entitled to use G-Portal data free of charge without any restrictions (including commercial use) except for the condition about acknowledgement of data credit as stipulated in G-portal terms of use 7.(2).Click [here](https://gportal.jaxa.jp/gpr/index/eula?lang=en) for detailed G-Portal data usage constrains.
GCOM-C/SGLI L2 Top of atmosphere radiance (1km) is obtained from the SGLI sensor onboard GCOM-C produced by the Japan Aerospace Exploration Agency (JAXA).GCOM-C is sun-synchronous sub-recurrent orbit satellite launched on December 23, 2017 and conducts long-term global observations of geophysical variables related to the global climate system across 28 items including aerosol and vegetation over 4 areas of atmosphere, land, ocean, and cryosphere. The data will be used to contribute to higher accuracy of global warming prediction. The SGLI has swath of 1150 km in the visible band and 1400 km in the infrared band. Level 2 products are defined to be granule scene and global (tile) data of physical quantity derived from Level 1B or Level 2 products and ancillary data such as meteorological data and various additional data related to the physical quantity. This dataset includes Top of atmosphere radiance (or reflectance by using the other conversion coefficients) of each band (Lt_VN01-11, Lt_SW01-04 and Lt_TI01-02), Land water flag, observation geometries, and QA flag.As the tile product of precise geometric corrected top of atmosphere (TOA) radiance, it corrects the parallax due to postural change or altitude using the parameter PGCP with positional variation estimated using GCP. The physical quantity unit is W/m^2/um/sr (or dimensionless for the reflectance).Land water flag is simply from the land water flag from L1B. The observation geometries include solar and satellite zenith and azimuth angles, and observation time in hour.The QA_flag shows flag of quality and condition of the geometric correction.The provided format is HDF5. The spatial resolution is 1 km. The projection method is EQA and the generation unit is "Tile". The current version of the product is Version 2.
No constraints but users need to be registered with [the G-portal User Registration system](https://gportal.jaxa.jp/gpr/user/regist1?lang=en) to download files.
EARTH SCIENCE>ATMOSPHERE>ATMOSPHERIC RADIATION