CEOS Instrument: L-Band Synthetic Aperture Radar (ALOS-2)




Instrument:L-Band SAR (ALOS-2)
Agency: JAXA
Mission: ALOS-2
Status:Operational
Type:Imaging radar (SAR)
Description:High resolution microwave imaging of land and ice for use in environmental monitoring, agriculture and forestry, disaster monitoring, Earth resource management and interferometry
Spatial Resolution: Spotlight mode (1 to 3 m), high resolution mode (3 to 10 m).
Swath Width: High resolution mode: 70 km, Scan SAR mode: 250 - 360 km, Polarimetry: 30 km
Wavebands: Microwave: L-Band 1270 MHz
Technology: Imaging radar (SAR)
Description: If radar is used, the problem of diffraction-limited resolution in MW still applies. In this case, however, by analysing range, azimuth and Doppler effect of the (coherent) signals, synthetic aperture can be implemented, and resolutions typically of 10-30 m can be achieved. Several combinations of polarisations in transmission and reception can be implemented. Resolution can be traded-off with swath (e.g. 30 m / 100 km or 150 m / 400 km). Interferometry between views from different passes enable appreciating changes. SAR exploiting different bands (L, S, C, X) emphasise different features. Applicable only in LEO.

Measurement List:

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CEOS Systems Engineering Office (SEO)

CEOS Data Base Version: 17 - Created: 2012-01-18