Volker Schwieger

Learn More
The TanDEM-X mission will derive a global digital elevation model (DEM) with satellite SAR interferometry. Two radar satellites (TerraSAR-X and Tandem-X) will map the Earth in a resolution and accuracy, which was never possible in earlier missions: an absolute height error of 10m resp. a relative height error of 2m for 90% of the data are aimed at. Height(More)
[1] The GPS (Global Positioning System) radio occultation experiment onboard the German CHAMP (CHAllenging Minisatellite Payload) satellite was successfully started in February 2001. By the end of July 2001 more than 11,000 globally distributed vertical profiles of atmospheric temperature were derived. Operational data processing is based on the double(More)
This paper outlines the general characteristics of variance-based sensitivity analysis and their advantages with respect to other concepts of sensitivity analysis. The main benefit are qualitative and quantitative correct results independent of the model characteristics. The author focuses on kinematic positioning as required for car navigation, driver(More)
The topics presented in this paper regard the project “Data Optimisation for integrated Telematics” (Do-iT) granted by the German ministry of economics and technology. Within this project the current traffic state will be derived by use of network-based data from numerous mobile phones of anonymous drivers. With regard to traditional methods like local loop(More)
The acquisition of road users to influence the traffic flow is known under the name of ‘Floating Car Data’ and different services are offered on the market. Probably because of the high communication costs – the GPS position has to be sent to a centre via the mobile telephone system – the availability for an area-wide acquisition of traffic data is low and(More)
SUMMARY The EU-project " Development of a Real Time Quality Support System for the Houses Construction Industry " (QuCon) has been started in 2009. Within this project the Institute for Applications of Geodesy to Engineering " (IAGB) is cooperating with the Frederick Institute of Technology (Nicosia, Cyprus), the TU Delft (Netherlands) and further partners.(More)
Engineering geodesy and geodetic measurement techniques deliver important information within construction processes. This is valid for all phases of the process: the planning phase, the construction phase itself as well as the monitoring after finalisation of the construction work. The aim is the delivery of information in realtime to navigate construction(More)
Indoor reconstruction or 3D modeling of indoor scenes aims at representing the 3D shape of building interiors in terms of surfaces and volumes, using photographs, 3D point clouds or hypotheses. Due to advances in the range measurement sensors technology and vision algorithms, and at the same time an increased demand for indoor models by many applications,(More)
Recently, there is an increasing interest to obtain cost-effective and accurate coordinates using the technique of GNSS Precise Point Positioning (PPP). This technique is mainly based on utilizing just one dual frequency GNSS instrument. The hydrography has the main interest in the field of positioning using the GNSS technique. The precise hydrographic(More)
This paper deals with a method to model variances and correlations for measurement quantities. The model of elementary errors is the base for this approach that leads to synthetic covariance matrices. Frequently measurements are correlated and these correlations influence the following processing and the respective results. The modelling and the influence(More)