Jilin-1

Long name	Jilin-1
Short name	JL1
Sensor type	Optical
Platform	Jilin-1
Key file name (use to open data set)	JL101A_PMS_yyyymmddhhmmss_nnnnnnnnn_nnn_nnnn_nnn_Ln_MSS_meta.xml JL101A_PMS_yyyymmddhhmmss_nnnnnnnnn_nnn_nnnn_nnn_Ln_PAN_meta.xml
Supported file extensions	.xml, .tif, .rpc, .jpg
Sections	Data product name and description Distribution disk files Returned data for supported format xref>

Data product name and description

Jilin-1 is a four-satellite group equipped with a multispectral (MS) camera with a resolution of 2.88 m and a panchromatic (PAN) camera with a resolution of 0.92 m. The swath width is 11.6 kilometers.

Note: The information provided herein is based on the data distributor's documentation.

Spectral bands: Spectral range (nm)	Spatial resolution (m)* (spectral resolution)	Maximum image dimensions (Across track x along track, km)	Notes
PAN: B1 (Pan): 500 - 800	0.92	11.6	N/A
MS: B1 (Blue): 450 - 520 B2 (Green): 520 - 600 B3 (Red): 630 - 690	2.88	11.6	N/A

* Resolution is always nadir position unless noted otherwise.

Processing level	Horizontal accuracy (m)	Description/notes
L1	N/A	N/A

Distribution disk files

Depending on the CATALYST Professional program you use, you may be prompted to load either the multispectral (MS) or panchromatic (PAN) data. For example, in CATALYST Professional Focus, in the File Selector window, after you select the *.xml file you may be prompted to select MS or PAN. In CATALYST Professional EASI, Python, or in another text-based program, the input file name can have the following formats:

JL101A_PMS_yyyymmddhhmmss_aaaaaaaa_bbb_cccc_ddd_LX_MSS_meta.xml
JL101A_PMS_yyyymmddhhmmss_aaaaaaaa_bbb_cccc_ddd_LX_PAN_meta.xml

Designator	Description
aaaaaaaaa	Mission number
bbb	Segment number
cccc	Scene number
ddd	Product number
LX	Level number (currently L1)

Warning: Data sets for this sensor are organized in a specific folder structure on disk. GDB uses this structure and the file names to identify the data product type. Do not alter the folder structure or any file names prior to data ingestion to ensure the image data and auxiliary information are imported correctly.

When opening a Jilin-1 data set, the files read by GDB are as described in the following tables. You must open the key file that corresponds to the data type for GDB to read the information.

File name	Format	Required	Contents/details
*_meta.xml	Extensible Markup Language	Yes	Key file name. Use this file to open the data set.
*.tif	GeoTIFF	Yes	Image data, one file for PAN band or all spectral bands.
*_rpc.txt	Text	Yes	Rational functions model data.
*_thumb.jpg	JPEG	Optional	Thumbnail image file.
*.jpg	JPEG	Optional	Overview image file.

Returned data for supported format

The following table describes the data structure after it is opened by GDB.

Data product	Data returned	Details
L1 (MS)	3 x [16U] raster channels 1 x [ORB] orbit segment 1 x [BIN] rational function model segment	N/A
L1 (PAN)	1 x [16U] raster channel 1 x [ORB] orbit segment 1 x [BIN] rational function model segment	N/A