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Mobility Approach of MultiSat WebService. Dipl.-Ing. Martin Ruhé German Aerospace Center (DLR) Institute of Transportation Research Workshop “Satellite based Traffic Measurement” Berlin, September 9 th 2002. Why Space Born ?.
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Mobility Approach of MultiSat WebService Dipl.-Ing. Martin Ruhé German Aerospace Center (DLR) Institute of Transportation Research Workshop “Satellite based Traffic Measurement” Berlin, September 9th 2002
Why Space Born? Space flight technology;already establishedfor transportationsystems Iridium Mobilecommunicationglobal available GPS Positioningfor Navigation Eutelsat Transmission of conventionaltraffic information Envisat Earth observation to produce digital maps
Technical Motivation • Modern methods of remote sensing showa realistic chance for space born traffic data collection. • Today it is possible to build up an optical camera with aresolution of better than 2 meters by a weightroundabout 4 kg and a frame size of 4 km. • It is possible to measure (airborne) the speed of vehicles with radar technology. km/h
Spatial Dimension Sensor fusion for Traffic Data by CCTV • Traffic has always a spatial dimension. Local accidents spread in all directions. • The stationary sensors yield only local measurements. • The transformation of local measurements to the transport network is always incorrect. • The traffic forecast needs traffic measurements with connection to spatial information.
Stationary Sensors • Stationary sensors work with different physical principles. • Stationary sensors are optimised for many differentspecial tasks. • Most sensors are highly developed and very accurate. • Most systems are passive, they do not need correspondingtechnology in the vehicles. • Traffic sensors are not optimized for data fusion. • In general online traffic data can only be used locally.They are not optimised for real-time transmission.
Comparison of Costs FCD = Floating Car Data EO = Earth Observation
Comparison of Costs Cross Border Transportation -The new challenge fortransportation management
Logistics Automotive industries Traffic management Intelligenttransportation systems Research Consultants Local authorities andtransportation departments Interviews of Specialists • The core questions: • Is your company presently exploiting satellite based information resources? • What would be the most important requirements for a future use of satellites? • Which of the proposed MultiSat WebService features are of any importance to your company? • If interested in purchasing information, what would be your preferred method of payment? The interview partners have been selectedfrom business range of:
Summary • The traffic forecast needs traffic measurements connected with borderless and spatial information. • The system design gives the opportunity to configure thespace system according to further customer needs. • The market analysis has shown a promising market demand and volume for MultiSat WebService. We all have to work on the topic of space born traffic data measurement because it is going to be a future theme intransportation research.