Transcript InSAR motion mapping basics and current projects

Contribution to GEOSS
Satellite InSAR – PSI
for ground
displacement
Alain
Arnaud, CEO mapping
Alain ARNAUD, CEO
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InSAR motion mapping basics and current projects
Radar satellites
In terferometric
=
Superimposition
of waves to detect
differences
S ynthetic
A perture
R adar
=
High resolution
radar system
First measurement
Second measurement Results
(afterwards)
Ground movement rate maps
Travel phase
between ground
and sensor gives
mmtric distance
3 cm
Difference between
two measurements
indicates ground
movement over
time
Ground movement time series
InSAR ground motion data utilised in a multiude of geo-hazard focused projects
PanGEO
SubCoast
- 3 cm
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Wide area map initiative of Terrafirma
• Traditionally InSAR analysis of local area or of single
phenomena = inefficient
• Advanced algorithms to process full image data
frames rapidly and allow multiple applications of data
• Methodology will be applicable to Sentinel-1 data to
allow rapid wide area motion maps to be produced
• Method for integrating multiple track datasets into a
single motion map
• Resulting datasets can be freely viewed
• Resulting datasets can be used for multiple
applications of InSAR to Geo Hazards
• To allow continental scale and future worldwide
ground motion dataset
Process large land-masses as one dataset – one dataset ….. many applications
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Wide area map initiative of Terrafirma
• Traditionally InSAR analysis of local area
or of single phenomena = inefficient
SPACE
SEGMENT
SENTINEL 1
• Advanced algorithms to process full image
data frames rapidly and allow multiple
applications of InSAR to Geo Hazards
• Methodology will be applicable to Sentinel1 data to allow rapid wide area motion
maps to be produced
NEW
CONCEPT
and NEW
ALGORITHMS
for a
NEW
PRODUCT
• Method for integrating multiple track
datasets into a single motion map
• Resulting datasets can be freely viewed
• To allow continental scale and future
worldwide ground motion dataset
Process large land-masses as one dataset – one dataset ….. many applications
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InSAR Benefits for Disasters: GeoHazards mapping
Landslides
• Wide area map for survey & ongoing local studies
with VHR SAR
Tectonics
• Wide area ground motion data – strain data for EPOS
and GEM etc
Volcanics
• Volcano activity monitoring: inflation/deflation
cycle
• Mining induced subsidence
Mine subsidence
Karst Geology
• Abandoned mine re-watering uplift
• Karst Geology – sink hole formation
• Dike stability
Flooding
• Subsidence monitoring of flood prone areas
Many applications can be served from one InSAR ground motion dataset
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