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Tributes

Friedrich Hopfner-Medaille Karl Rinner Preis

Karl Rinner Preis

Rinner

To promote outstanding international presentations and publications of young Austrian scientists the Austrian Geodetic Commission annually awards the Karl Rinner Prize. This prize is also intended to appreciate the services of Prof.Dr.mult. Karl Rinner, who had promoted Austrian geodesy in many ways and led it to high international prestige.

[ Bylaws ]

Prize winner:

Dr. Andreas Roncat
Dr. Andreas Roncat

Dr. Andreas Roncat, 2014

Curriculum Vitae

Publication

ABSTRACT
Full-waveform lidar has gained increasing attention in 3-D remote sensing and related disciplines during the last decade due to its capability of delivering both geometric and ra- diometric information in the same spatial resolution. Radiometric information may either be related to the echo, e.g., echo ampli- tude and width, or to the target itself, e.g., the backscatter cross section (BCS). Echo parameters, often obtained by Gaussian de- composition, as well as target properties, which are (geo)physical properties and therefore independent of data acquisition mission parameters, are considered as additional features of the point cloud generated by laser scanning. The BCS commonly is de- rived by performing a deconvolution which results in its temporal derivative, the differential backscatter cross-section (dBCS), and subsequent integration. The temporal shape of the dBCS has gained little attention in the literature so far. In this letter, we discuss the derivation of additional target parameters, namely the statistical moments of the respective target dBCS. Besides dis- cussing the applicability of established deconvolution approaches for the extraction of statistical moments in the dBCS, special em- phasis is laid on their derivation in B-spline-based deconvolution. Uniform B-splines allow for linear deconvolution and subsequent radiometric calibration. We illustrate the potential of the proposed method by a sample data set stemming from an airborne lidar campaign in complex mountainous terrain.

Dr. Hana Krásná, 2013

Curriculum Vitae

Publication

Abstract
Frequency-dependent Love and Shida numbers, which characterize the Earth response to the tidal forces, were estimated in a global adjustment of all suitable geodetic Very Long Baseline Interferometry (VLBI) sessions from 1984.0 to 2011.0. Several solutions were carried out to determine the Love and Shida num- bers for the tidal constituents at periods in the diurnal band and in the long-period band in addition to val- ues of the Love and Shida numbers common for all tides of degree two. Adding up all twelve diurnal tidal waves that were estimated, the total differences in displacement with respect to the theoretical conven- tional values of the Love and Shida numbers calculated from an Earth model reach 1.73 ± 0.29 mm in radial direction and 1.15 ± 0.15 mm in the transverse plane. The difference in the radial deformation following from the estimates of the zonal Love numbers is largest for the semi-annual tide Ssa with 1.07 ± 0.19 mm.

Award Ceremony

Sponsor: Federal Section of Chartered Engineering Consultants
Internet: www.bsik.at

Dr. Hana Krásná
Dr. Hana Krásná

Dr. Elmar Wasle
Dr. Elmar Wasle

Dr. Elmar Wasle, 2011

Publication

ABSTRACT
The European Union has more than 5 million kilometers of paved roads, and 90% of the total road network has an asphalt surface. Continuous monitoring and control of parameters during road construction are significant for the quality and durability of the road. Any sub-optimal operation within the asphalt construction chain will lead to a reduction in road quality, what results inevitably to a decreased life-time. An increasing lifespan, on the contrary, will result in a reduction of cost of road maintenance. Key factors are to optimally manage truck fleets, operate the paver, and steer the compactors. Thereby GNSS technology has been chosen to play a major role.
This paper introduces the ASPHALT project, describes the newly multi-frequency GNSS receiver under development, the high precision multi-frequency antenna, the
RF frontend, and in particular the baseband; the RTK solution to achieve the high precision position solution, and the EDAS implementation to provide continuous EGNOS correction data stream for position output. First results of RTK solutions will be presented as well as the performance of the multi-frequency GNSS receiver tracking loops. The objective is to meet the requirements of the asphalt road construction in order to increase the quality of roads.

Award Ceremony

Sponsor: Vermessungsbüro Rinner, Graz
Internet: www.vermessung-rinner.at

Dr. Tobias Nilsson, 2010

Curriculum Vitae

Publication

Abstract
Impact of atmospheric turbulence on geodetic very long baseline interferometry
We assess the impact of atmospheric turbulence on geodetic very long baseline interferometry (VLBI) through simulations of atmospheric delays. VLBI observations are simulated for the two best existing VLBI data sets: The continuous VLBI campaigns CONT05 and CONT08. We test different methods to determine the magnitude of the turbulence above each VLBI station, i.e., the refractive index structure constant Cn 2 . The results from the analysis of the simulated data and the actually observed VLBI data are compared. We find that atmospheric turbulence today is the largest error source for geodetic VLBI. Accurate modeling of atmospheric turbulence is necessary to reach the highest accuracy with geodetic VLBI.

Award Ceremony

Sponsor: Leica Geosystems Austria GmbH
Internet: www.leica-geosystems.at

Dr. Paulo Jorge Mendes Cerveira
Dr. Tobias Nilsson

Dr. Helmut Woschitz
Dr. Helmut Woschitz

Dr. Helmut Woschitz, 2008

Curriculum Vitae

Award winning publication

Laudatory

Ceremonial speech and presentation are published in „Österreichische Zeitschrift für Vermessung und Geoinformation“ (VGI), 98. volume, band 1 / 2010.

Entwicklung einer langarmigen faseroptischen Strain-Rosette zum Monitoring eines Rutschhanges

Abstract:
Fiberoptic sensors may easily be embedded into a structure and thus give information about international deformations of the object. For the investigation of a deep-seated mass movement a large embedded strain rosette was developed. The sensors used are long gauge (5 m) fibre optical interferometers of SOFO type and allow the precise measurement of elative length changes. The high precicion of the SOFO Systems (2 µm for long-term static measurement and 10 nm for dynamic measurements with 1 kHz) was a real challenge in the development, as independent field-checks cannot be performed. Geodetic standard equipment give precicions that are smaller by a factor of about 10. Thus laboratory testing becomes crucial. When embedding the sensors, their representative attachment to the ground material becomes very critical. It is the goal to use the strain rosette for investigating the local deformation behaviour of the sliding area, and consequently to derive deeper knowledge about the mechanism of the deep-seated mass movement. Static measurements for the long-term monitoring as well as dynamic measurements for the investigation of possible strain waves will be performed. This paper describes the development of the large strain rosette, its realisation by embedding it in the landslide area and shows the high capability (e.g. detecting strain waves with 1 nm amplitudes) of the system using dedicated experiments

Sponsor: Federal Section of Chartered Engineering Consultants
Internet: www.bsik.at

Award Ceremony

Dr. Paulo Jorge Mendes Cerveira, 2007

Laudatory

Publication

Ceremonial speech and presentation are published in „Österreichische Zeitschrift für Vermessung und Geoinformation“ (VGI),97. volume, band 4 / 2009.

The Earth Rotation

Abstract:
The author gives a short historical review on Earth rotation, including recent results on that topic. Variations of universal time or length of day can be easily understood, except those arising from the interior of the Earth. However, a much more complicated issue lays in the difference between precession-nutation and polar motion, which causes a severe headache.

Sponsor: Chamber of Architects and Chartered Engineering Consultants
section for Styria and Carinthia
www.aikammer.org

Dr. Paulo Jorge Mendes Cerveira
Dr. Paulo Jorge Mendes Cerveira

Brunner
Dr. Alexander Reiterer

Dr. Alexander Reiterer, 2006

Festreden und Festvortrag sind in der Öst. Z. für Vermessung & Geoinformation (VGI),
95. Jahrgang, Heft 4 / 2007 veröffentlicht.

„Intelligente“ Steuerung bildgebender Sensoren in der Ingenieurgeodäsie

Abstract:
In the past, high-precision online 3D-measuring required artificial targets defining the points on the objects to be monitored. For many tasks like monitoring of displacements of buildings, artificial targets are undesired. Image-based measurement systems can perform their measurements even without targeting. Such systems use the texture on the surface of the object to find “interesting points” which can replace the artificial targets. At the Vienna University of Technology a team has focused the work on the research of such a image-based measurement system. Main goal of this process is the automation of the measurement procedure.
This paper is a summary of the presentation held for the Karl-Rinner Awarding at the TU-Graz. It is notable, that the research results have already been published in a more detailed form in Alexander Reiterer: The development of an online knowledge-based videotheodolite measurement system. Knowledge-Based Systems Journal, Nr. 20, S. 73-85, 2007.

Dr. Andreas Wieser, 2005

Festreden und Festvortrag sind in der Öst. Z. für Vermessung & Geoinformation (VGI),
95. Jahrgang, Heft 4 / 2007 veröffentlicht.

High-Sensitivity GPS: Möglichkeiten und Grenzen der Anwendung

Abstract:
The development of high-sensitivity (HS) GPS receivers has been driven by the US mandate on location of cell phone users who place an emergency call, and by the increasing interest in location based services. HS-GPS receivers increase the avail-ability of position solutions in environments with limited line-of-sight satellite visibility and may allow positioning even indoors. They are now commonly used within the latest cell phones, car navigation systems and other consumer products but have not entered technical areas with stringent accuracy requirements. The paper highlights the reasons. The basic concept of HS-GPS is reviewed, examples of applications are given, and the limitations are discussed. It is shown that HS-GPS is primarily useful for applications which require position availability rather than accuracy.

Dr. Andreas Wieser
Dr. Andreas Wieser

Dr. Johannes Böhm
Dr. Johannes Böhm

Dr. Johannes Böhm, 2004

Festreden und Festvortrag sind in der Öst. Z. für Vermessung & Geoinformation (VGI),
93. Jahrgang, Heft 3 / 2005 veröffentlicht.

Numerische Wettermodelle für die troposphärische Modellierung bei GPS und VLBI

Abstract:
Tropospheric mapping functions which are used for modeling tropospheric refraction are one of the major error sources in the analyses of GPS (Global Positioning System) and VLBI (Very Long Baseline Interferometry) observations. Errors of these mapping functions do not only influence the tropospheric zenith path delays, but - through correlations - also the station heights. In recent years, data from numerical weather models have been applied to determine the mapping functions. For the Vienna Mapping Function (VMF) meteorological profiles are taken from the ECMWF (European Centre for Medium-Range Weather Forecasts). Investigations show that the application of the VMF does improve the precision of geodetic parameters, and even, the station heights themselves can change at the cm-level.

Dr. Franz Rottensteiner, 2003

Festreden und Festvortrag sind in der Öst. Z. für Vermessung & Geoinformation (VGI), 93. Jahrgang, Heft 4 / 2005 veröffentlicht.

Automatische Ableitung detaillierter Gebäudemodelle für 3D Stadtmodelle

Abstract:
This paper deals with the automatic generation of 3D building models from laser scanner data and aerial images. The work flow consists of two stages: building detection and the geometrical reconstruction of the buildings by polyhedral models. A method for building detection was implemented and tested. It is based on the Dempster-Shafer fusion of laser scanner data and multi-spectral images. Using this method, buildings covering an area >120 m2 could be detected very reliably. The quality of the results deteriorates quickly with a decreasing building size. Building reconstruction starts with the extraction of roof planes. These planes are grouped to obtain polyhedral models. Finally, a consistent adjustment considering all available sensor data is carried out in order to estimate the building parameters. Building reconstruction can be carried out using laser scanner data alone. Improved results can be expected if laser scanner data and aerial images are combined.

Dr. Franz Rottensteiner
Dr. Franz Rottensteiner