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- The CBERS (China-Brazil Earth Resources Satellite)cooperative program has been jointly developed by China and Brazil to build up a set of remote sensing Satellites. CBERS-1 was launched on Oct. 14, 1999, which operated until Aug. 2003. CBERS-2 was launched on Oct. 21, 2003, which is still working in orbit. The third satellite CBERS-2B was launched on Sep.19, 2007, which carries in-board a multisensor payload with different spatial resolutions called: HR (High Resolution Panchromatic), CCD (Charge Coupled Device) and WFI (Wide Field Image) camera.
IRMSS is present in CBERS-1 and -2, not however in CBERS-2B, where it was replaced by HRC (High-Resolution Panchromatic Camera). The IRMSS operates in 4 spectral bands, thus extending the CBERS spectral coverage up to the thermal infrared range. It images a 120 km swath with the resolution of 80m (160m in the thermal channel). In 26 days one obtains a complete Earth coverage that can be correlated with the images of the CCD camera.
HR camera is the first civilian high spatial resolution sensor, whose designed spatial resolution is 2.36m. HR camera operates in a single spectral band which covers visible and near-infrared bands. It is only present in CBERS-2B, not in CBERS-1 and -2. It generates images of 27km width and resolution 2.7m, which will allow the observation of surface objects with large detail. Given its 27km swath, five 26 days cycles are necessary for the 113km standard CCD swath to be covered by HRC.
The CCD camera provides images of a 113 km wide strip with 20m spatial resolution. Since this camera has a sideways pointing capability of ± 32 degrees, it is capable of taking stereoscopic images of a certain region. In addition, any phenomenon detected by the WFI may be "zoomed in" by the oblique view of the CCD camera with a maximum time lag of 3 days. The CCD camera operates in 5 spectral bands that include a panchromatic one from 0.51 to 0.73 µm. The two spectral bands of the WFI are also present in the CCD camera to allow complementing the data of the two types of remote sensing images. A complete coverage cycle of the CCD camera takes 26 days.
The WFI has a ground swath of 890 km which provides a synoptic view with spatial resolution of 260m. The Earth surface is completely covered in about 5 days.
The data collected by the satellites are used in several applications, such as CPTEC weather forecast, ocean circulation studies, tides, chemistry of the atmosphere, agriculture planning, besides others, thru more than 600 platforms installed in Brazil. One important application is the hydrological basin monitoring by the ANA and SIVAM platform networks, which provides Brazilian river and rain data.
CBERS-3 is expected to be launched in 2009, CBERS-4 in 2011. CBERS-3 and -4 satellites represent an evolution of CBERS-1 and -2. Four cameras will be present in the payload module, with improved geometrical and radiometric performance. They are: PanMux Camera-PANMUX, Multi-spectral Camera-MUXCAM, Scanning Medium Resolution Scanner-IRSCAM and Wide Field Imaging Camera-WFICAM. The orbits of the two satellites will be the same as for CBERS-1 and -2.
Group: Instrument_Details
Entry_ID: CBERS
Group: Instrument_Identification
Instrument_Category: Solar/Space Observing Instruments
Instrument_Class: Photon/Optical Detectors
Instrument_Type: Cameras
Short_Name: CBERS
End_Group
Group: Instrument_Associated_Sensors
Short_Name: WIDE FIELD IMAGER
Short_Name: HIGH RESOLUTION CAMERA
Short_Name: CHARGE COUPLED DEVICE
End_Group
Group: Associated_Platforms
Short_Name: CBERS-1
Short_Name: CBERS-2
Short_Name: CBERS-2B
Short_Name: CBERS-3
Short_Name: CBERS-4
End_Group
Online_Resource: http://www.cbers.inpe.br/en/programas/cbers1-2.htm
Creation_Date: 2008-05-30
Group: Instrument_Logistics
Instrument_Owner: China National Space Administration (CNSA)
Instrument_Owner: Brazilian Instituto Nacional de Pesquisas Espaciais (INPE)
End_Group
End_Group
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