Level-2 products are provided as HDF files by scene.
Level-3 products are provided on a global basis.
G-Portal: HDF5
G-Portal Processing Request: GeoTIFF
JASMES: NetCDF4

Level-2 products are provided as a single HDF5 file including CHLA (Chlorophyll-a concentration), TSM (Total suspended matter), and CDOM (Colored dissolved organic matter) by scene.
Level-3 products are provided as individual physical quantity products.
G-Portal: HDF5
G-Portal Processing Request: GeoTIFF (Individual files)
JASMES: NetCDF4

Using the Windows command prompt or the equivalent, go to the directory where "SGLI_geo_map_win.exe" is located.
（The Windows command prompt can be accessed from Windows Start > Windows System > Command Prompt.）
Below is an example where the SGLI_geo_map_win.exe and the SST folder containing the data are in the sgli_data folder on the C drive.

The command is an example of map projection of the SD array SST in Image_data and output as an LZW compressed GeoTIFF file.
The pixel value of 65535 is set for an invalid value, and the slope and offset in the attribute (text information) are stored in the GDAL_METADATA tag.
The values can be found in the <Slope> and <Offset> tags in the XML file output with the GeoTIFF conversion.

See "GeoTIFF Tag Information" for the tag information stored in the converted GeoTIFF file.

Since error values are not excluded in this conversion, they are set to invalid ones using per-pixel information in the XML file or SD array QA_flag created during the GeoTIFF conversion.
To create an SST image from QA_flag with less cloud influence, see the "The gdal command applying the QA_flag." For more information on pseudo-color images, please refer to the following FAQs.
https://shikisai.jaxa.jp/faq/faq0053.html

Using the Windows command prompt or the equivalent, go to the directory where "SGLI_geo_map_win.exe" is located.
(The Windows command prompt can be accessed from Windows Start > Windows System > Command Prompt.)
Below is an example where the SGLI_geo_map_win.exe and the NWLR folder containing the data are in the sgli_data folder on the C drive.

The command is an example of map projection of the SD arrays NWLR_670, NWLR_565, and NWLR_490 in the Image_data of the L2 NWLR(Normalized Water leaving radiance, etc.) product and output as GeoTIFF files, respectively.
The pixel value of 65535 is set for an invalid value and output.
The GeoTIFF files are output individually, and the gdal (QGIS) command is used to store the three files into a single GeoTIFF.
Finally, the slope and offset values in the attribute (text information) are stored in the GDAL_METADATA tag and compressed in LZW.

First, convert each Image_data SD array you wish to combine into a GeoTIFF. This is for three files for RGB compositing.
Once the conversion is complete, close the command prompt.

See "GeoTIFF Tag Information" for the tag information stored in the converted GeoTIFF file.

Next, start the OSgeo4W Shell.
(The OSgeo4W Shell can be accessed from Windows Start > QGIS 3.22.8 > OSgeo4W Shell for a typical installation. The above GeoTIFF output tool is also available from the OSgeo4W Shell.)

The three files created above are stored by assigning red to NWLR_670, green to NWLR_565, and blue to NWLR_490.

The following command specifies the physical quantity's conversion factor (slope/offset).

To use the gdal command, start the OSgeo4W Shell.
(The OSgeo4W Shell can be started from Windows Start > QGIS 3.22.8 > OSgeo4W Shell for a typical installation. The above GeoTIFF output tool is also available from the OSgeo4W Shell.)
Navigate to the directory where the data to be converted to GeoTIFF is stored.

Below is an example where the data to be converted is in the sgli_data folder on the C drive.

The command is an example of map projection of the SD array CHLA_AVE in Image_data and output as an LZW compressed GeoTIFF file.
The pixel value of 65535 is set for an invalid value, and the slope and offset values in the attribute (text information) are stored in the GDAL_METADATA tag.
Slope and offset values can be checked with the gdalinfo command, HDFView (tool download required), etc.
For an example, please refer to "How to confirm SD array name of Level-2/Level-3 ocean products."

Here is an example of applying QA_flag information to SST data created with the "SGLI Map Projection & GeoTIFF Conversion Tool."
As well as SST, QA_flag in Image_data should be converted to GeoTIFF using the "SGLI Map Projection & GeoTIFF Conversion Tool."
The following command is an example of extracting data in which the 13th (Acceptable) and 14th (Good) bit flags in one pixel set in QA of SST are "1." Flags are "0" or "1."
Information on SST's QA_flag can be found in the "Products and Algorithms" section of the EORC GCOM-C website ( https://suzaku.eorc.jaxa.jp/GCOM_C/data/update/Algorithm_SST_en.html).

* right_shift(A, 13) ----If A has the pixel value (decimal: 18431) "01000111111111111111", it is shifted right by 13. The data will be "010." (A >> 13) can be used to replace it.
* bitwise_and(A, 3) ---- Performs a bitwise operation of "11" (decimal: 3) on the pixel value of A. Extracts bits 13 and 14 of the original data. (A & 3) can be used to replace it.

	010	(2)
bitwise_and	011	(3)
---------------------
	010	(2)

(0 and 0 --> 0, 1 and 1 -->1, 0 and 1 --> 0)

* (A > 0) * 1 ----- If the value of A is greater than "0," "1" is assigned. (A > 0) If the equation is not satisfied, the value is "0." For convenience, "*1" is set, but it does not matter if "*1" is not set because the value will be "1" if the expression is satisfied.

The created QA_flag data is used to create SST data without cloud effects.

Set slope/offset with gdal_edit.

For SD array names, please refer to "SD Array Names of Level2/Level3 Ocean Products" below.
For more information, please visit the EORC GCOM-C "Standard Products and Algorithms" website.

The SD array can be checked in the following ways.
For GeoTIFF conversion of Level 3 products, please use gdalinfo of gdal.

gdalinfo	HDFView
If you have a standard installation of QGIS, please use OSGeo4W Shell. (Start Menu > QGIS 3.22.8 > OSGeo4W Shell) for version 3.22 Go to the directory containing the data to be converted and enter gdalinfo followed by the file name. Image_data_xxx_Offset, Slope corresponds to offset, scale in gdal. After "Image_data/" in SUBDATASET is the SD array name; for conversion in gdal, specify the underlined part.	Example of Level3 CHLA display. （1）SD array name in Image_data （2）SD array name in Geometry_data (only folder if not included) （3）Additional information on CHLA_AVE, slope, offset information, etc.
>gdalinfo GC1SG1_20220701D01M_D0000_3MSG_CHLAF_3000.h5 Image_data_CHLA_AVE_Error_DN=65535 Image_data_CHLA_AVE_Maximum_valid_DN=65534 Image_data_CHLA_AVE_Minimum_valid_DN=0 Image_data_CHLA_AVE_Offset=0 Image_data_CHLA_AVE_Slope=0.0016 Image_data_CHLA_AVE_Unit=mg m^-3 ・・・・・・ Subdatasets: SUBDATASET_1_NAME=HDF5:"GC1SG1_20220701D01M_D0000_3MSG_CHLAF_3000.h5"://Image_data/CHLA_AVE SUBDATASET_1_DESC=[4320x8640] //Image_data/CHLA_AVE (16-bit unsigned integer) SUBDATASET_2_NAME=HDF5:"GC1SG1_20220701D01M_D0000_3MSG_CHLAF_3000.h5"://Image_data/CHLA_QA_flag SUBDATASET_2_DESC=[4320x8640] //Image_data/CHLA_QA_flag (8-bit unsigned character)

	Product Name	Physical quantity	ID	SD array name(Dataset name)
Level2	NWLR (Normalized Water Leaving Radiance)	Normalized water leaving radiance	NWLR	NWLR_380, NWLR_412 NWLR_443, NWLR_490 NWLR_530, NWLR_565, NWLR_670
		Photosynthetically available radiatioin		PAR
		Atmospheric correction param		TAUA_670, TAUA_865
	IWPR (In-water properties)	Colored dissolved organic matter	IWPR	CDOM
		Chlorophyll-a concentration		CHLA
		Suspended solid concentration		TSM
	SST (Sea surface temperature)	Sea surface temperature	SST_	SST Cloud_probability
Level3	NWLR (Normalized Water leaving radiance(380nm))	Normalized Water leaving radiance	L380	L380_AVE
	NWLR (Normalized Water leaving radiance(412nm))		L412	L412_AVE
	NWLR (Normalized Water leaving radiance(443nm))		L443	L443_AVE
	NWLR (Normalized Water leaving radiance(490nm))		L490	L490_AVE
	NWLR (Normalized Water leaving radiance(530nm))		L530	L530_AVE
	NWLR (Normalized Water leaving radiance(565nm))		L565	L565_AVE
	NWLR (Normalized Water leaving radiance(670nm))		L670	L670_AVE
	PAR (Photosynthetically available radiatioin)	Photosynthetically available radiatioin	PAR_	PAR_AVE
	ACP (Atmospheric correction param(670nm))	Atmospheric correction param	T670	T670_AVE
	ACP (Atmospheric correction param(865nm))		T865	865_AVE
	CHLA (Chlorophyll-a concentration)	Chlorophyll-a concentration	CHLA	CHLA_AVE
	TSM (Suspended solid concentration)	Suspended solid concentration	TSM_	TSM_AVE
	CDOM (Colored dissolved organic matter)	Colored dissolved organic matter	CDOM	CDOM_AVE
	SST (Sea surface temperature)	Sea surface temperature	SST_	SST_AVE

When converted to GeoTIFF using the SGLI Map projection & GeoTIFF conversion Tool, the coefficients (slope/offset) of the geophysical conversion are output to an xml file created at the same time.
Display in a text editor or browser.

Below is an example of SIST xml.
Substitute the values of <Slope> and <Offset> into the formulas in <Data_description> to convert pixel values into physical quantities.
<Data_description>Sea Surface Temperature[SST]: SST[degree]=DN*Slope+Offset</Data_description>
<Slope>1.200000e-003</Slope>
<Offset>-1.000000e+001</Offset>

When calculating with the gdal command, the value converted to degrees[degree] is stored with the following command.
The Splope,Offset value can be left as "1.200000e-003, -1.00000000e+001".

Product quality flags (QA_Flag) are stored as 16 or 8 ON (1) and OFF (0) information.
Product quality information can be found in the "QA_flag information" section of each product page on the "Standard Products & Algorithms" （ https://suzaku.eorc.jaxa.jp/GCOM_C/data/product_std.html ）website.

bit No.	15	14	13	12	11	10	9	8	7	6	5	4	3	2	2	1	0
Example	0	1	0	0	0	0	0	1	0	0	0	0	0	0	0	0	0

Classification	Tag ID	Name		Definition/Value
TIFF Field	258	BitPerSample	Number of bits per component.	8 or 16 32（when converting physical quantity）
	259	Compression	Compression method	1: No compression 5: LZW（when compression is specified）
	257	ImageLength	Image length	Height (vertical length) of an image expressed in line units.
	256	ImageWidth	Image width	Width (horizontal length) of an image expressed in pixel units.
	274	Orientation	Scanning orientation	1: TopLeft（The image is stored as it is shown）
	262	PhotometricInterpretation	Photometric type	1: BlackIsZero（Display 0 in grayscale image as black）
	284	PlanarConfiguration	Order of storing image data	1: Pixel priority mode (pixel-by-pixel) e.g.RGBRGBRGB…… 2: Plane priority mode (plane-by-plane) e.g.RRR……GGG……BBB……
	339	SampleFormat	Type of data	1: Unsigned integer data 3: single precision floating point number (when converting physical quantity)
	277	SamplesPerPixel	Number of samples per pixel	Number of stored channels/band
	278	RowsPerStrip	The number of lines per strip	The number of lines of image data per strip.
	42112	GDAL_METADATA	GDAL_METADATA	The slope and offset values are stored according to the settings.
	42113	GDAL_NODATA	GDAL_NODATA	Used in the GDAL library and treated as transparent.
GeoKey	34735	GeoKeyDirectoryTag	GeoKey Directory	Store GeoKey directory
	34736	GeoDoubleParamsTag	GeoDouble parameter	Stores double-valued GeoKeys
	34737	GeoAsciiParamsTag	GeoAscii Parameters	Stores ASCII-valued GeoKeys
	33922	ModelTiepointTag	Tie point	Tie point information(I,J,K,X,Y,Z). Image position (I,J,K) and geographic coordinates (X,Y,Z)
	33550	ModelPixelScaleTag	Pixel scale in map linear units per pixel	Horizontal and vertical pixel spacing (ScaleX, ScaleY, ScaleZ)
	1024	GTModelTypeGeoKey	Type of geographic coordinate information	1: ModelTypeProjected（Projected coordinate system） 2: ModelTypeGeographic（Latitude-longitude coordinate system）
	1025	GTRasterTypeGeoKey	Type of raster	1: RasterPixelIsArea (One pixel represents an area in the real world)
	1026	GTCitationGeoKey	CRS Citation	Geographic (Lat/Lon) / WGS84 PS / WGS84 (When PS is selected)
	2054	GeogAngularUnitsGeoKey	Coordinate unit(angle) identification code.	9102: Degree
	2048	GeographicTypeGeoKey	Type of coordinate system	4326: WGS84
	2049	GeogCitationGeoKey	Geographic coordinate system citation	WGS 84 (When converted by gdal)
	3072	ProjectedCSTypeGeoKey	Projected coordinate reference system	32767: User-defined (When PS is selected)
	3073	PCSCitationGeoKey	Projection citation	Geographic (Lat/Lon) / WGS84 PS / WGS84 (When PS is selected)
	3074	ProjectionGeoKey	Projection method	32767: User-defined (When PS is selected)
	3075	ProjCoordTransGeoKey	Coordinate transformation method	15: CT_PolarStereographic (When PS is selected)
	3076	ProjLinearUnitsGeoKey	Linear unit	9001: Linear_Meter (When PS is selected)
	3081	ProjNatOriginLatGeoKey	Latitude of map-projection Natural origin	71(Northern hemisphere), -71(Southern hemisphere) (When PS is selected)
	3082	ProjFalseEastingGeoKey	Gives the easting coordinate of the map projection Natural origin	0 (When PS is selected)
	3083	ProjFalseNorthingGeoKey	Gives the northing coordinate of the map projection Natural origin	0 (When PS is selected)
	3095	ProjStraightVertPoleLongGeoKey	Longitude at Straight Vertical Pole. For polar stereographic	0 (When PS is selected)