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.

Specification



  • 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

Imaging Modes

Imaging Modes

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 ]