Urs Wegmüller Gamma Remote Sensing AG, Gümligen, Switzerland Monitoring Alpine Transportation Infrastructures Using Space Techniques

Partners: Gamma Remote Sensing AG, Gümligen, Switzerland Institute 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: W ide-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 Image width is  10 km Gotthard railway

mm/year mm/year ENVISAT: TerraSAR-X: Motion of transportation infrastructures

mm/year ERS-1/2ENVISAT Image width is  15 km Motion caused by tunneling _ + 23º from nadir

23 March 2010 → 9 August mm 5 Gamma Portable Radar Interferometer

Main fields of research  Satellite 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 Earth Above right: ENVISAT PSI Below left: Cosmo-SkyMed Below right: ALOS PALSAR