Urs WegmüllerGamma Remote Sensing AG,

Gümligen, Switzerlandhttp://www.gamma-rs.ch

Monitoring Alpine Transportation Infrastructures

Using Space Techniques

Partners:Gamma Remote Sensing AG, Gümligen, SwitzerlandInstitute of Navigation, Graz University of Technology, Austria

Users: Operators of alpine transportation infrastructures (railway companies, institutes representing the national roads, companies from the energy sector) and private geological offices→ SBB, OeBB, ASFINAG, BAFU, K&H

Sponsor: European Space Agency (ESA - ESTEC) Integrated Applications Promotion Programme (IAP)

KO date: 26 November 2012

Monitoring Alpine Transportation Infrastructures

Using Space Techniques

• Densely inhabited Alps, large transportation networks• Alpine natural hazards with severe human and economic

consequences (rockfalls and landslides) • Railway and road operators responsible for safe operation

Infrastructure operators require:• Wide-area information providing probabilities and intensities

of potential hazards endangering their infrastructure ( satellite based deformation information)

• In case of imminent danger in a sensible section of the network more detailed measurements are required

( terrestrial deformation monitoring)• In case of emergency an early warning system is required

Needs and requirements for space-based services

•Our proposed solution is aiming at supporting users from the transportation infrastructure in the regional assessment of landslide hazard, the local monitoring of critical unstable slopes and the ground deformation monitoring in near real time with the integration of the space techniques radar interferometry (satellite and terrestrial) and GPS/GNSS.

•The main information to be provided is ground motion, which can include motion of the transportation infrastructure (railway, roads), motion of rocks or terrain slopes above transportation infrastructure, and motion caused by tunneling.

Scope of the feasibility project

• Satellite based deformation maps using differential interferometric SAR (DINSAR) and persistent scatterer interferometry (PSI) GAMMA)

• Satellite based deformation monitoring (GAMMA)

• Terrestrial interferometric radar measurements (GAMMA)

• GPS/GNSS Solutions (INAS TU-Graz)

Elements of service offer

Deformation mapping over large areas

mm/year

0.0 -10.0

Image width is 10 km

Gotthard railway

mm/year

0.0 -5.0

mm/year

0.0 -5.0

ENVISAT: 2002-2010 TerraSAR-X: 2008-2012

Motion of transportation infrastructures

mm/year

0.0 -10.0

ERS-1/2 ENVISAT

1992-2000 2004-2010

Image width is 15 km

Motion caused by tunneling

_+23º from

nadir

23 March 2010 → 9 August 2011

0 mm 5

Gamma Portable Radar Interferometer

Main fields of research

www.inas.tugraz.at

Satellite based PositioningSatellite based Positioning–GNSS (GPS, GLONASS and Galileo)•Signal generation•Software based receiver•GNSS investigations

–Precise Point Positioning•Development of appropriate algorithms (real time PPP)

–Surveying / geodata acquisition•Satellite-based methods•Combination with terrestrial methods and other sensors•Main project:Measurement and processing of a geodetic network for the Koralm railway tunnel

Proposed Proof-of-Concept: Wassen

Above left: Google EarthAbove right: ENVISAT PSI2004-2010Below left: Cosmo-SkyMed 2010.09.09-2010.10.11Below right: ALOS PALSAR 2006.09.13-2006.10.29