Interferometric capabilities of ALOS PALSAR and its utilization
Ryoichi Furuta(1) , Masanobu Shimada(1)
, Takeo Tadono(1)
, and Manabu Watanabe(1)
Office Tower X 22F, Triton Square, Harumi-Island,
JAXA's new land observing satellite,
Advanced Land Observing
Satellite: ALOS, will be launched in JFY2005.
ALOS carrying L-band SAR,
PALSAR, has capability to derive
InSAR/DInSAR products from repeat pass
acquisition data of each 46 cycle days.
Observation modes of PALSAR were
screened to six modes out of
132 combining 18 different off-nadir beams for
strip SAR and five observation modes,
i.e., FBS (Fine Beam Single), FBD
(Fine Beam Dual), DT (Direct Transmission),
SCANSAR, and polarimetry. They
are FBS of 21.5°, FBS of 34.3°, FBS of 41.5°, FBD of 41.5°,
burst), and POL of 21.5°. PALSAR has the
opportunity of global coverage in
3 times par year by FBS/FBD mode,
and once a year by ScanSAR mode. From
this acquisition, we will provide Digital
Elevation Model, DEM, by InSAR
processing. It defined high level product.
Moreover, we will derive
deformation maps of global area
and/or local area with the DInSAR
DInSAR technique applicability is expanded
to various fields in present
day. Especially, utilization in
disaster monitoring and mitigation is
expected. Monitoring of crustal deformation of the pre- and post-earthquake
gives scientific knowledge
of earthquake mechanisms and volcanic monitoring
is also. Monitoring of landslides
and subsidence has capability to mitigate
severe disaster and support decision-making.
Moreover, InSAR processing is
providing high accurate and fresh DEM of
disaster area and supporting
deformation detection and it takes
information of the topography of
disaster area. This information will
assist in disaster relief activities.
In addition, DEM by InSAR processing w
ill be useful in the field of
topology, geology and resource surveying.
In order to clarify the
utilization of InSAR/DInSAR technique of
PALSAR, InSAR/DInSAR technique was applied to
various studies using JERS-1
SAR. ALOS PALSAR overview and its strategy are introduced and the examples
of InSAR/DInSAR products are introduced.