Wilsdorf M.,University of Leipzig |
Ziemann A.,University of Leipzig |
Raabe A.,University of Leipzig |
Belitz H.-J.,Amt fur Geoinformationswesen der Bundeswehr
Larmbekampfung | Year: 2010
A procedure which was developed within the framework of a project for the German armed forces (Bundeswehr) to operationally forecast the sound exposure is described in this study. This method includes meteorological influences on the sound propagation. Therefore, at first, different meteorological situations (differentiation regarding temperature, wind speed, wind direction) were classified. For the different classes the spatial distribution of the sound level attenuation was calculated using the model SMART (Sound propagation model of the atmosphere using raytracing). The results were stored in a database. This database is used to forecast the "sound weather" (sound propagation situation). The analysis and evaluation of this forecasts as well as the access to the database is realized using the visualization tool MetaVIS (Meteorological attenuation visualization). Regional sound climatologies, which contain a multitude of different atmosphere conditions over eleven years, are used thereby to evaluate the sound weather as typical or atypical. This procedure enables an operationally applicable forecast of noise exposure. Moreover, with this routine a regionalization of an entire territory in areas with a similar sound climatology is possible. Such estimation was conducted by analysing maps of sound level attenuation for several atmospheric structures. As a result, a map for restructuring the consulting areas of the Bundeswehr, considering meteorological influences on the sound propagation, was acquired.
Baldauf M.,German Weather Service |
Seifert A.,German Weather Service |
Forstner J.,German Weather Service |
Majewski D.,German Weather Service |
And 2 more authors.
Monthly Weather Review | Year: 2011
Since April 2007, the numerical weather prediction model, COSMO (Consortium for Small Scale Modelling), has been used operationally in a convection-permitting configuration, named COSMO-DE, at the Deutscher Wetterdienst (DWD; German weather service). Here the authors discuss the model changes that were necessary for the convective scale, and report on the experience from the first years of operational application of the model. For COSMO-DE the ability of the numerical solver to treat small-scale structures has been improved by using a Runge-Kutta method, which allows for the use of higher-order upwind advection schemes. The one-moment cloud microphysics parameterization has been extended by a graupel class, and adaptations for describing evaporation of rain and stratiform precipitation processes were made. Comparisons with a much more sophisticated two-moment scheme showed only minor differences in most cases with the exception of strong squall-line situations. Whereas the deep convection parameterization was switched off completely, small-scale shallow convection was still parameterized by the appropriate part of the Tiedtke scheme. During the first year of operational use, convective events in synoptically driven situations were satisfactorily simulated. Also the daily cycles of summertime 10-m wind and 1-h precipitation sums were well captured. However, it became evident that the boundary layer description had to be adapted to enhance convection initiation in airmass convection situations. Here the asymptotic Blackadar length scale l∞ had proven to be a sensitive parameter. © 2011 American Meteorological Society.
Brandenburger W.,Amt fur Geoinformationswesen der Bundeswehr |
Drauschke M.,University of Federal Defense Munich |
Mayer H.,University of Federal Defense Munich
Photogrammetrie, Fernerkundung, Geoinformation | Year: 2013
Summary: We propose an approach for the automatic detection of cornice structures above windows. It combines the edges from a rectified façade image and the geometrical information of a 3D point cloud derived from a set of images, e.g. using mayer et al. (2012). Based on the detection of the façade plane in the point cloud and the segmentation of its outline we detect windows to restrict the search space for cornices. Analysing the 3D points as well as the detected edges we are able to reliably distinguish between triangular, arch-shaped and horizontal cornices. This is demonstrated by experiments for façades from Freising, Munich and Schwabach. © 2013 E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany.
Hartmann R.,Amt fur Geoinformationswesen der Bundeswehr |
Backes T.,Amt fur Geoinformationswesen der Bundeswehr |
Willig D.,Amt fur Geoinformationswesen der Bundeswehr
Geographische Rundschau | Year: 2011
Under the NATO International Security Assistance Force (ISAF) mission in Afghanistan, the Bundeswehr Geoinformation Service (BGIS) performs support functions in the extended task spectrum of the Bundeswehr. The article highlights three sample areas from the spectrum of Bundeswehr geoscientific support in Afghanistan and describes the particular conditions in the mission country. These relate to the military geological aspects of camp construction on the silty Afghan loess soils, the impact of which on the mobility of the forces, among others, is considered additionally. In order to ensure that the German troops are supplied with sufficient water of high quality, modern wells are constructed in accordance with standards applicable in Germany and partly with the support of local companies. The survey (portrayed in detail) of so-called compass swinging bases for the adjustment of emergency navigation systems for aircraft conducted by the Bundeswehr Geoinformation Service's special surveyors is another indispensible contribution to the geoscientific support to ISAF.