 What
is ENVISYS?
Why
ENVISYS?
The
ENVISYS concept
Who
is ENVISYS?
Work
packages
Emergency
management
Marine
oil spill pollution
System
presentation
Contact
us!
Publications
Related
web sites
Back to Main Page
|
Remote sensing allows measuring
changes of the terrain surface shape down to the centimetre level. Hence,
it can be used to detect small earth crust movements that may be an early
warning of an earthquake. In addition, the damages caused by an earthquake
may be determined using remote sensing data. ENVISYS proposes an integrated
system with these two features and fully automatic retrieval of data.
 
SAR interferometry measures the phase difference between two images,
corresponding to the change in the round-trip path length of the radar
waves to the same ground point. The right image shows the phase difference
between two images. In the left image the colours represent the magnitude
of the earth crust movement, with areas of largest movements in red.
|
