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ALOS-2 Satellite Images
To Continue the Major Mission of L-band SAR Satellite
Not Only Progress Toward the High Resolution
But Also Toward the Application of Multi / Quad Polarization
In 2011, ALOS has been operated for more than five years since January 2006 to accomplish four mission goals, including: cartography, regional observations, disaster monitoring, and resource surveys.
The ALOS-2 was launched on May 24, 2014. It is the follow-on JAXA L-SAR satellite mission of ALOS approved by the Japanese government in late 2008. The overall objective is to provide data continuity to be used for cartography, regional observation, disaster monitoring, and environmental monitoring.
ALOS-2 Satellite Images
Agile Spacecraft
ALOS-2 has a body pointing function of ±30º in the roll axis. For the purpose of minimizing observation intervals, the requirement for attitude maneuvering is up to 2 minutes from the Earth pointing attitude to right- or left-looking, and the maneuvering from right- to left-looking (or from left- to right-looking) is up to 3 minutes.
ALOS-2 Satellite Images
ALOS-2 Imaging Modes
ALOS-2 Satellite Images
Beam Mode Polarization Resolution ( m ) Scene
Size ( km )
Full
Performance
Range ( ° )
Slant Range Azimuth
Spotlight SP 3.0 1.0 25 X 25 8 to 70
Stripmap
Ultra-fine
SP or DP 3.0 3.0 50 X 50
Stripmap
High-sensitive
SP or DP 6.0 4.3 55 X 70
FP 5.1 4.3 40 - 50 X 70
Stripmap
Fine
SP or DP 9.1 5.3 70 X 70
FP 8.7 5.3 30 X 70
ScanSAR nominal
( 28 Mhz )
SP or DP 47.5
( 5 look )
77.7
( 3 look )
350.5 X 355
ScanSAR nominal
( 14 Mhz )
SP or DP 95.1
( 5 look )
77.7
( 3 look )
350.5 X 355
ScanSAR wide SP or DP 44.2
( 2 look )
56.7
( 1.51 look )
489.5 X 355
* SP: Single Polarization, [ HH ] or [ VV ] or [ HV ]
** DP: Dual Polarization, [ HH / HV ] or [ VV / VH ]
*** FP: Full Polarization ( quad ), [ HH / HV / VH / VV ]
Repeat cycle
14 days
Center frequency
1.2 GHz
L band
Wavelength
22.9 cm
Look direction
L / R
Incidence angle
8 to 70°
Imaging mode
7 types
Resolution
1 to 100 m
Polarization
Single
Dual
Full ( Quad )
Real Case ( Use for forest management )
When comparing images taken by the ALOS in 2010 and by the ALOS-2 in 2014, we can understand changes in a forest area. We provide image data to Brazil for deforestation monitoring three to four days after observation.
ALOS-2 Satellite Images
* The data are provided by JAXA as the ALOS-2 sample product
References
1. JAXA Web Site
2. RESTEC Web Site
3. ALOS-2 Price List

For further information of the retired ALOS satellite, please see ALOS Satellite Images
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