Regular updates of satellite radar data and their integration into a GIS (Geographic Information System) environment significantly enhance the value of radar remote sensing for investigating and managing geohazards.
SqueeSAR™, DInSAR and RMT all provide surface displacement measurements at different rates, ranging from millimetre to centimetre, for mapping and monitoring moving areas. We provide both single phenomenon and wide area analyses. Unlike traditional ground based surveys, our measurements are remotely acquired and capable of covering vast areas over time. Such an approach becomes particularly advantageous when considering risk or inaccessible areas.
Surface displacement data from satellite provide a long-term solution to geo hazard monitoring.
Explore our satellite monitoring solutions for:
Site characterization and inventory update
SqueeSAR™ data are used to identify, characterize and monitor geo hazards.
An extensive archive of satellite imagery together with SqueeSAR™ allow the temporal evolution of ground motion to be reconstructed, providing valuable insight into understanding and forecasting future behavior.
Displacement maps are used to delineate boundaries and detect changes in the rate of displacement. They help verify and update existing inventories.
VALLE D’AOSTA: Instability mapping over a region of the Italian Alps. Images show the regional scale capabilities of SqueeSAR™ mapping, using both satellite acquisition geometries (ascending and descending). Regional analyses can be performed from a few to thousands of square kilometers. Satellite imagery: RADARSAT, ascending and descending datasets, analysis period: 2003 – 2011, Background imagery: Google Earth.
PST project. Displacement velocity of millions of measurement points over the Italian territory.
Radar satellite data monitor the temporal evolution of potential hazards.
residual risk analysis
InSAR monitoring is used by civil and environmental protection agencies to identify areas at risk, aiding the establishment of natural disaster response plans. Ground motion data are used as input into geo-hazard models for the calculation of human risk exposure and the preparation of emergency procedures.
After a disaster, satellite monitoring is used to assess the residual risk in the area and to measure ground deformation resulting from the event.
MONTESCAGLIOSO (ITALY): Image shows SqueeSAR™ results over Montescaglioso before a landslide occurred (in the box area) on the 3rd December 2013. The Italian Civil Protection Department (DPC), through the University of Florence, used SqueeSAR™ to identify precursor movements. Satellite imagery: COSMO-SkyMed, Analysis period: 30/01/2012 – 03/12/2013, Background image: Google Earth.
MONTESCAGLIOSO: a satellite RMT analysis was carried out to estimate rapid movements during the event (landslide), that exceed those observable with SqueeSAR™. Thanks to the availability of both acquisition geometry datasets, 3D decomposition of displacement was obtained. Satellite imagery: COSMO-SkyMed, ascending and descending data, Analysis period: 2012 – 2013, Background image: Google Earth.
L’AQUILA: earthquake deformation pattern. Image shows a co-seismic interferogram (using 2 satellite images) of the L’Aquila earthquake, Italy, on the 6th April 2009. Ground displacement is represented on a cyclic scale, with one full color circle representing 28mm of displacement. Satellite imagery: Envisat (Feb 2009 – Apr 2009), Background image: Google Earth.
ETNA VOLCANO: SqueeSAR™ analysis has highlighted deformation patterns on Mt. Etna. Satellite imagery: ERS, Analysis period: 1995 – 2000, Background: Google Earth.
CHILE: ground motion map of the deformation caused by the earthquake that struck Chile on 16th September 2015. The map has been generated using two Sentinel-1A images (before and after the event) and shows the accumulated motion in the period between 24th August and 17th September 2015.
JAKARTA: InSAR technology was applied to estimate land subsidence for the World Bank. The study covered a 4-year period from 2007 to 2011, including 18 months using high resolution satellite imagery. Results showed strong subsidence affecting a housing complex in the Jakarta Bay and in different sub districts. Satellite imagery: COSMO-SkyMed Apr. 2010 to Oct. 2011. Background image: SPOT 5 image acquired on May 5th, 2010, credit: SpotImage.