5,280 research outputs found
REMOTE: Geodetic metrology for future accelerators - Geodetic techniques for determining position and orientation with high accuracy
No full textAbstract
A core service of applied geodesy are the determination of coordinates and orientation with respect to chosen reference frames and the derivation of information including quality indicators therefrom. This is required for digitizing the 3d world, for transferring plans and models from the virtual space into the real one, and for reliably quantifying deformations and rigid body motion over time. The lecture will give a brief overview about techniques and solutions. Emphasis will be put on instrumental, environmental and practical accuracy limitations for coordinate measurements using GNSS, total stations and other standard geodetic instruments, as well as on limitations for azimuth and coordinate transfer from above ground to underground infrastructure.
Short Bio Andreas Wieser
Andreas Wieser is a professor of Geosensors and Engineering Geodesy at ETH Zurich since 2012. He has over 20 years of experience in research and teaching from Universities in Austria, Canada and Switzerland. He has been a product manager for GPS-based tolling. His research covers high-precision GNSS, parameter estimation, quality control and calibration, digitization of reality, geodetic monitoring, and the development of novel measurement systems. Since about ten years he focusses on the development of innovative laser-based sensor technology, and point-cloud processing. He is the Chair of the Society for the Calibration of Geodetic Devices, a member of the Swiss, Austrian and German Geodetic Commission, and of the Swiss Federal Surveyor’s Commission.</p
Stylos kai edraiōma tēs ekklēsias, sive, Dissertatio de iustificatione hominis
No full textquam ... sub praesidio ... Ioh. Henrici Heideggeri ... placido eruditorum examini subiicit Andreas Steinerus, Vitod. author & respondens, ad diem Octobris loco horisque solitisDiss. Hohe Schule Zürich, 167
Author: Andreas Johannis Prytz
No full textAn edition of the consecration sermons in Gothenburg Cathedral 1633 by Superintendent Andreas Johannis Prytz, with introductory comments. The first sermon deals with the need for Church buildings, the second with the consecration of a new Church
Untersuchungen eines Sensorsystems für die Messung windinduzierter Beschleunigungen an einer Stahlplattform
No full textWe must combine conservation of nature with benefits to society. Interview by Gaby Allheilig with Andreas Heinimann on IPBES' Global Assessment Report on Biodiversity and Ecosystem Services
No full textOn 6 May 2019, the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) presented its report on the state of biodiversity and ecosystem services worldwide. The first such assessment since 2005, it concludes that biodiversity and ecosystem loss has reached the point where it threatens human well-being. The researchers involved recommend several urgent measures to political decision-makers. Andreas Heinimann of CDE was the one Swiss scientist who worked as a lead author on a chapter of the report
Indoor localisation for wheeled platforms based on IMU and artificially generated magnetic field
No full textIn recent years the research on positioning and navigation systems for indoor environments has progressed rapidly. For this purpose many technologies based on e.g. UWB, WLAN, ultrasonic or infrared were utilized. However, these systems are restricted on line-of-sight (LOS) conditions due to disturbances, fading and multipath inside of buildings. Because magnetic fields are able to penetrate walls, building materials or other objects, a DC Magnetic signal based Indoor Local Positioning System (MILPS) was developed, which provides localisation in harsh indoor environments. Multiple electrical coils - representing reference stations - and tri-axial magnetometers as mobile stations are utilized. Capturing the magnetic field intensities of at least three different coils leads to the specific slope distances and finally to the observer's position. Because the current positioning algorithm is designed for stop-and-go applications originally, this contribution focuses on the sensor fusion of MILPS and an Inertial Measurement Unit (IMU) to face kinematic applications for wheeled platforms. The short time stable IMU-integrated data, which is influenced by sensor drifts and integration errors, is then supported by MILPS, which delivers positions in a low frequent update interval. To estimate a position in two dimensional environments - in the first step - an Iterative Kaiman Filter (IKF) is applied to eliminate linearization errors caused by inaccurate predictions. Therefore the dead reckoning trajectory is updated by using MILPS' distance observations. In this context first promising experiments with combinations of IMU and MILPS have been performed proving the capability of sensor integration. While acceleration and angular rate measurements lead to a state prediction (consisting of current position and velocity) external MILPS-observations are used for IMU-data support. The IKF estimates a current state in respect to both measurement systems' statistical information
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