CBERS-4A

Long name	CBERS-4
Short name	CB4
Sensor type	Wide Scan Multispectral and Panchromatic (WPM) Camera
Platform	CBERS-4A
Key file name (use to open data set)	*.xml
Supported file extensions	.tiff, .jpg, *.xml
Sections	Data product name and description Distribution disk files Returned data for supported format References

Data product name and description

The CBERS-4A satellite carries four cameras:

Wide Scan Multispectral and Panchromatic Camera (WPM)
Multispectral Camera (MUX)
Wide Field Imaging Camera(WFI)
Data Image Transmitter (DTS) for MUX cameras, WFI and WPM
Digital Data Recorder (DDR)
Data Collection System (DCS)
Space Environment Monitor (SEM)

Currently GDB only support Wide Scan Multispectral and Panchromatic Camera (WPM).

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

Sensor	Spectral bands: Spectral range (nm)	Spatial resolution (m)* (spectral resolution)	Maximum image dimensions (Across track x along track, km)	Swath width (km)
WPM	450 - 520 (blue) 520 - 590 (green) 630 - 690 (red) 770 - 890 (NIR)	Panchromatic: 2m Multispectral: 8m	N/A	92km

* Resolution is always nadir position unless noted otherwise.

CBERS-4A image data products process level are as follows:

Processing level	Description	Notes
L2	System corrected image, expect some translation error	Tested and supported
L4	Orthorectified with ground control points	Data is not available on PCI data server

Only Level L2B image data is available and supported.

Distribution disk files

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.

You can open a CBERS-4A data set, by selecting the CB04A_WPM_*-MSS.xml file or the CB04A_WPM_*-PAN.xml file.

When opening a CBERS-4A WPM dataset, the files read by GDB are described in the following table.

MUXCam

File name	Format	Required	Contents/details
*-MSS.xml	Extensible Markup Language	Yes	Key file, contains data set metadata
*_thumb.jpg	JPEG	Optional	Thumbnail image.
*.tiff	GeoTIFF	Yes	Image data

Returned data for supported format

CBERS-4A data can be opened directly in its raw vendor format or imported into a PCIDSK (*.pix) file by using the key file name. For optimal processing, use the PCIDSK format.

The data structure, after it is opened by GDB, is as described in the following table.

Data product	Data returned	Details
CBERS-4A (WPM) 2 m PAN	1 x [16U] raster channel 1 x [ORB] orbit segment 1 x [TEX] main product annotation	PAN band.
CBERS-4A (WPM) 8 m MS	4 x [16U] raster channels 1 x [ORB] orbit segment 1 x [TEX] main product annotation	Blue, green, red, NIR bands.

References

For more information about CBERS-4A, go to CBERS-4A.