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Splitting of the Middle Layer of Lpw Safnwc/Msg Satellite Product ...

By: J. Ruiz; M. Velazquez; M. A. Martinez; G. Cuevas; M. Manso

Description: Agencia Estatal de Meteorología (former INM), Spain. Seven of the infrared channels from the Spinning Enhanced Visible and Infrared Imagery (SEVIRI) instrument, on board the Meteosat Second Generation (MSG), are used to retrieve Layer Precipitable Water (LPW) and Stability Analysis Imagery (SAI) in the SAFNWC framework. Both products are retrieved using a statistical retrieval based on neural networks; they are routinely generated every fifteen minutes ...

Martínez, M. A., Velázquez, M., Cuevas, G., and Ruiz, J.: Improvements to the neural network retrieval of Layer Precipitable Water including an IR SEVIRI local radiance-bias correction. Joint 2007 EUMETSAT Meteorological Satellite Conference and the 15th Satellite Meteorology & Oceanography Conference of the AMS. Amsterdam, The Netherlands, http://www.eumetsat.int/Home/Main/Publications/Conference_and_Workshop_Proceedings/groups/cps/documents/document/pdf_conf_p50_s10_12...

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Microwave Sensors for Detection of Wild Animals During Pasture Mow...

By: A. Patrovsky; E. M. Biebl

Description: Technische Universität München, Fachgebiet Höchstfrequenztechnik, Arcisstraße 21, 80333 München, Germany. More than 400000 wild animals are killed or severely injured every year during spring time pasture mowing. Conventional methods for detection and removal or expulsion of animals before mowing are either inefficient or very time-consuming. The first really working method is based on a pyro-detector which senses the temperature contrast between the ani...

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A Simple Evaluation Procedure of the Tan Calibration and the Influ...

By: U. Stumper

Description: Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany. For the 7-term general TAN (Through-Attenuator-Network) self-calibration method of a four-sampler vector network analyser (VNA), and for all derived calibration methods like TLN, TRL, TRM, TAR, or TMN, it is shown that a very simple evaluation procedure of the seven error terms is possible, even if the Through connection is replaced by a reflectionless network with know...

Engen, G. F. and Hoer, C. A.: Thru-Reflect-Line: An Improved Technique for Calibrating the Dual Six-port Automatic Network Analyzer, IEEE Trans. Microwave Theory Tech., 27, 987–993, 1979.; Eul, H.-J. and Schiek, B.: A Generalized Theory and New Calibration Procedures for Network Analyzer Self-Calibration, IEEE Trans. Microwave Theory Tech., 39, 724–731, 1991.; Gronau, G.: Höchstfrequenztechnik. Berlin, Springer, Ch. 8, 389–398, 2001.; Rytting, D.: Network Analyzer Error ...

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A Study of the 1 and 2 January 2010 Sea-storm in the Ligurian Sea ...

By: L. F. Onorato; S. Gallino; A. Orlandi; F. Pasi

Description: CNR-IBIMET, Firenze, Italy. During the last days of 2009 and the first days of 2010, a wide and deep low pressure system over Western Europe generated a very extended and strong southerly pressure gradient on the whole Western Mediterranean Sea with a resulting very rough to high sea state. Over the Ligurian Sea (North Western Mediterranean) the resulting sea state was a combination of a very tuned (in both frequency and direction) swell coming from the...

Janjic, Z. I.: A Nonhydrostatic Model Based on a New Approach, Meteorol. Atmos. Phys., 82, 271–285, 2003.; Booij, N., Ris, R. C., and Holthuijsen, L. H.: A third-generation wave model for coastal regions. Model description and validation, J. Geophys. Res., 104(C4), 7649–7666, 1999.; Bradbury, A. P., Mason, T. E., and Poate, T.: Implications of the spectral shape of wave conditions for engineering design and coastal hazard assessment – evidence from the english channel, 1...

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Wind Turbines in Icing Conditions: Performance and Prediction : Vo...

By: R. Oechslin; R. Cattin; S. Dierer

Description: Meteotest, Fabrikstrasse 14, 3012 Bern, Switzerland. Icing on structures is an important issue for wind energy developments in many regions of the world. Unfortunately, information about icing conditions is mostly rare due to a lack of measurements. Additionally, there is not much known about the operation of wind turbines in icing conditions. It is the aim of the current study to investigate the effect of icing on power production and to evaluate the p...

Homola, M. C., Nicklasson P. J., and Sundsbø, P. A.: Ice sensors for wind turbines, Journal of Cold Regions Science and Technology, 46, 125–131, 2006.; Dierer, S., Cattin, R., Steiner, P., Grünewald, T., Steinkogler, W., and Lehning, M.: Vereisungskarte der Schweiz, Final report of the project funded by the Federal Office of Energy, http://www.bfe.admin.ch/php/modules/...

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Towards an Integrated Probabilistic Nowcasting System (En-inca) : ...

By: B. Bica; A. Kann; M. Suklitsch

Description: Central Institute for Meteorology and Geodynamics, Vienna, Austria. Ensemble prediction systems are becoming of more and more interest for various applications. Especially ensemble nowcasting systems are increasingly requested by different end users. In this study we introduce such an integrated probabilistic nowcasting system, En-INCA. In a case study we show the added value and increased skill of the new system and demonstrate the improved performance...

Bowler, N. E., Pierce, C. E., and Seed, A. W.: STEPS: A probabilistic precipitation forecasting scheme which merges an extrapolation nowcast with downscaled NWP, Q. J. Roy. Meteorol. Soc., 132, 2127–2155, doi:10.1256/qj.04.100, 2006.; Gerard, L., Piriou, J. M., Brozkova, R., Geleyn, J.-F., and Banciu, D.: Cloud and precipitation parameterization in a meso-gamma scale operational weather prediction model, Mon. Weather Rev., ...

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Dead Time Optimization Method for Power Converter : Volume 11, Iss...

By: F. Gronwald; U. Bergmann; C. Deselaers

Description: Hamburg University of Technology, 21079 Hamburg, Germany. This paper introduces a method for dead time optimization in variable speed motor drive systems. The aim of this method is to reduce the conduction time of the freewheeling diode to a minimum without generation of cross conduction. This results in lower losses, improved EMC, and less overshooting of the phase voltage. The principle of the method is to detect beginning cross currents without addin...

Acker, B., Sullivan, C. R., and Sanders, S. R.: Synchronous rectification with adaptive timing control, Proc. IEEE PESC, 1, 88–95, 1995.; Huselstein J.-J., Gauthier, C., and Glaize, C.: Use of the MOSFET channel reverse conduction in an inverter for suppression of the integral diode recovery current, IEEE Power Electronics and Applications, 2, 431–436, 1993.; Jayant Baliga, B.: Fundamentals of Power Semiconductor Devices, Springer Science+Business Media, LLC, Boston, MA,...

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A Vlsi Design Concept for Parallel Iterative Algorithms : Volume 7...

By: C. C. Sun; J. Götze

Description: Dortmund University of Technology, Information Processing Lab, Otto-Hahn-Str. 4, 44227 Dortmund, Germany. Modern VLSI manufacturing technology has kept shrinking down to the nanoscale level with a very fast trend. Integration with the advanced nano-technology now makes it possible to realize advanced parallel iterative algorithms directly which was almost impossible 10 years ago. In this paper, we want to discuss the influences of evolving VLSI technolog...

Ahmedsaid, A., Amira, A., and Bouridane, A.: Improved SVD systolic array and implementation on FPGA, in: IEEE International Conference on Field-Programmable Technology (FPT), pp. 3–42, 2003.; Brent, R P. and Luk, F T.: The Solution of Singular-Value and Symmetric Eigenvalue Problems on Multiprocessor Arrays, SIAM Journal on Scientific and Statistical Computing, 6, 69–84, 1985.; Gelsinger, P.: Moore's Law: We See No End in Sight,, Tech. rep., Intel Chief Technology Office...

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Remote Sensing and Modeling of Lightning Caused Long Recovery Even...

By: E. D. Schmitter

Description: University of Applied Sciences Osnabrueck, 49076 Osnabrueck, Germany. On the 4 November 2012 at 3:04:27 UT a strong lightning in the midst of the North Sea affected the propagation conditions of VLF/LF transmitter radio signals from NRK (Iceland, 37.5 kHz) and GBZ (UK, 19.58 kHz) received at 5246° N 8° E (NW Germany). The amplitude and phase dips show a recovery time of 6–12 min pointing to a LOng Recovery Early VLF (LORE) event. Clear assignment of the...

Barrington-Leigh, C. P.: Fast Photometric Imaging of High Altitude Optical Flashes above Thunderstorms, chap. 2.4.2, Ionization, Dissertation, Stanford University, Sep. 2000.; Cotts, B. R. T. and Inan, U. S.: VLF observation of long ionospheric recovery events, Geophys. Res. Lett., 34, L14809, doi:10.1029/2007GL030094, 2007.; Cummer, S. A., Inan, U. S., and Bell, T. F.: Ionospheric D region remote sensing using VLF radio...

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Determination of Quality and Storage-time of Dielectric Mixtures U...

By: R. Knöchel; M. Kent; F. Daschner; O. Schimmer

Description: Microwave Group, Faculty of Engineering, University of Kiel, Germany. This paper presents a novel approach for determining certain material properties from permittivity measurements. It does not rely on physical models and mixture formulas. Instead, the reflection time domain response of the material to a step impulse is evaluated in a narrow time window near the steepest ascent of the pulse. A dedicated time domain spectrometer is introduced, which re...

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Site-dependent Decrease of Odour-related Peak-to-mean Factors with...

By: E. Petz; G. Schauberger; W. Knauder; M. Piringer

Description: Central Institute for Meteorology and Geodynamics, Vienna, Austria. The peak-to-mean concept developed earlier by the authors to calculate odour-related separation distances is applied here to meteorological input for dispersion models provided by ultrasonic anemometers. In addition to conventional meteorological input parameters like wind direction, wind speed and stability classes, three-dimensional sonics provide also turbulence information via the O...

Baechlin, W., Ruehling, A., and Lohmeyer, A.: Bereitstellung von Validierungsdaten für Geruchsausbreitungsmodelle – Naturmessungen (A validation data set for odour dispersion models – field measurements), Forschungsbericht FZKA-BWPLUS, Förderkennzeichen BWE 20003, Ingenieurbüro Lohmeyer, Karlsruhe, Dresden, 183 pp., 2002.; Best, P., Lunney, K., and Killip, C.: Statistical elements of predicting the impact of a variety of odour sources, Water Sci. Technol., 44, 157–164, 2...

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Propagation Models for High Sites in Urban Areas : Volume 4, Issue...

By: M. Neuland; A. Hecker; T. Kuerner

Description: Institute for Communications Technology, Schleinitzstrasse 22, 38106 Braunschweig, Germany. Analyses of results from commonly used propagation models applied to UMTS Ultra High Sites in urban environments are presented. Differences between predicted and measured values for a site in Nuernberg are calculated as a function of the distance between base station and mobile station and as a function of the angle of incidence. An assessment of the validity range of...

Boensch, R.: E-Plus will hoch hinaus, VDI-Nachrichten, 27, 35, 2004.; COST 231: Urban transmission loss models for mobile radio in the 900 and 1800 MHz bands (rev 2), Den Haag, COST 231 TD (90) 119 Rev 2, 1991.; Eggers, P.: Note on the usage of walfish-type urban pathloss prediction models, Den Haag, COST 231 TD (91) 87, 1991.; Hecker, A. and Kuerner, T.: Analysis of Propagation Models for UMTS Ultra High Sites in Urban Areas, PIMRC'05, Berlin, Germany, 11–14~September, ...

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Mimo Performance of a Planar Logarithmically Periodic Antenna with...

By: D. Kornek; M. Stege; I. Rolfes; H. Rabe

Description: Institute for Radiofrequency and Microwave Engineering, Hanover, Germany. The increasing interest in wireless transmission of highest data rates for multimedia applications (e.g. HDTV) demands the use of communication systems as e.g. described in the IEEE 802.11n draft specification for WLAN including spatial multiplexing or transmit diversity to achieve a constant high data rate and a small outage probability. In a wireless communications system the tr...

Foschini, G. J. and Gans, M. J.: On Limits of Wireless Communications in a Fading Environment when Using Multiple Antennas, Wireless Personal Communications, 6, 311–335, 1998.; Fujimoto, K. and James, J. R.: Mobile antenna systems handbook, Artech House, 2001.; Jiménez, V. P. G.: Channel Estimation for Bit-loading in OFDM-based WLAN, University Carlos III of Madrid, Spain, 2002.; Klemp, O. and Eul, H.: On the Application of Multimode Diversity Reception using Miniaturize...

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Improving the Performance of Bicm-id and Mlc Systems with Differen...

By: R. Urbansky; W. Sauer-greff; T. Arafa

Description: University of Kaiserslautern, Communications Engineering, Gottlieb-Daimler-Str., 67653 Kaiserslautern, Germany. In bandwidth limited communication systems, the high data rate transmission with performance close to capacity limits is achieved by applying multilevel modulation schemes in association with powerful forward error correction (FEC) coding, i.e. coded modulation systems. The most important practical approaches to coded modulation systems are mul...

ten Brink, S.: Convergence of Iterative Decoding, IEEE Electron. Lett., 35, 1117–1119, 1999.; Hagenauer, J.: The Turbo Principle: Tutorial Introduction and State of the Arts, Symposium on Turbo Codes, Brest, France, September 1997, 1–11, 1997.; Imai, H. and Hirakawa, S.: A New Multilevel Coding Method Using Error-Correcting Codes, IEEE T. Inform. Theory, 23, 371–377, 1977.; Li, Y. and Ryan, W.E.: Bit-Reliability Mapping in LDPC-Coded Modulation Systems, IEEE Commun. Lett...

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Differential Algebraic Equations of Mos Circuits and Jump Behavior...

By: T. Thiessen; P. Sarangapani; W. Mathis

Description: Indian Institute of Technology, Madras, India. Many nonlinear electronic circuits showing fast switching behavior exhibit jump effects which occurs when the state space of the electronic system contains a fold. This leads to difficulties during the simulation of these systems with standard circuit simulators. A method to overcome these problems is by regularization, where parasitic inductors and capacitors are added at the suitable locations. However, ...

Chua, L.: Dynamic nonlinear networks: State-of-the-art, IEEE T. Circuits Syst., CAS-27, 1059–1087, 1980.; Desoer, C. and Wu, F.: Trajectories of nonlinear RLC networks: A geometric approach, IEEE T. Circuit Syst., 19, 562–571, 1972.; Enz, C C., Krummenacher, F., and Vittoz, E A.: An analytical MOS transistor model valid in all regions of operation and dedicated to low-voltage and low-current applications, Analog Integr. Circuits Signal Process., 8, 83–114, 1995.; Ichirak...

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A Torsional Sensor for Mems-based Rms Voltage Measurements : Volum...

By: R. Judaschke; S. Büttgenbach; J. Dittmer

Description: Institute for Microtechnology, Technische Universität Braunschweig, Germany. RF voltage measurement based on electrostatic RMS voltage-to-force conversion is an alternative method in comparison to the conventional thermal power dissipation method. It is based on a mechanical force induced by an RF voltage applied to a micro-mechanical system. For a theoretically adequate resolution and high precision measurements, the necessary geometrical dimensions o...

Bartek, M., Xiao, Z., van Mullem, C., and Wolffenbuttel, R.: Bulk-micromachined electrostatic RMS-to-DC converter: Design and fabrication, in: Tech. digest MME 2000, 1–3 October, Uppsala, Sweden, p. A14, 2000.; Beissner, S., Wogersien, A., Buttgenbach, S., Schrader, T., and Stumper, U.: Micromechanical device for the measurement of the RMS value of high-frequency voltages, Sensors, 2003, Proc. IEEE, 1, 631–635, 2003.; Dittmer, J., Judaschke, R., and Büttgenbach, S.: Aufb...

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Chemical Weather Forecasting: a New Concept of Integrated Modellin...

By: A. Baklanov

Description: Danish Meteorological Institute, Lyngbyvej 100, 2100 Copenhagen, Denmark. During the last decade a new field of atmospheric modelling – the chemical weather forecasting (CWF) – is quickly developing and growing. However, in the most of the current studies and publications, this field is considered in a simplified concept of the off-line running chemical transport models with operational numerical weather prediction (NWP) data as a driver. A new concept ...

Baklanov, A. and Korsholm, U.: On-line integrated meteorological and chemical transport modelling: advantages and prospective, in: ITM 2007: 29th NATO/SPS International Technical Meeting on Air Pollution. Modelling and its Application, 24–28.09.2007, University of Aveiro, Portugal, 21–34, 2007.; Baklanov, A., Korsholm, U., Mahura, A., Petersen, C., and Gross, A.: ENVIRO-HIRLAM: on-line coupled modelling of urban meteorology and air pollution, Adv. Sci. Res., 2, 41–46, 20...

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Analyse Unterschiedlicher Modellierungsvarianten Des Direct Power ...

By: W. Wilkening; O. Jovic; S. Ritzmann; U. Stürmer

Description: Fraunhofer Institut für Zuverlässigkeit und Mikrointegration, Gustav-Meyer-Allee 25, 13355 Berlin, Germany. Dieser Beitrag analysiert zwei Ansätze zur Modellierung eines Teststandes zur Charakterisierung von integrierten Schaltungen mittels Direct Power Injection (DPI) auf einem Wafer. Die erste Variante ist zur Analyse bereits vorliegender integrierter Schaltungen nutzbar. Sie benötigt gemessene S-Parameterdaten, mit denen die an einem realen Messobjek...

IEC 62132-4: Integrated Circuits-Measurements of Electromagnetic Immunity 150 kHz to 1 GHz-Part 4: Direct RF Power Injection Method, Int. Electro-Tech. Commiss. Standard IEC 62132, pp. 8–9, December 2004.; Fiori, F.: A New Nonlinear Model of EMI-Induced Distortion Phenomena in Feedback CMOS Operational Amplifiers, IEEE Transactions on Electromagnetic Compatibility, 44, 495–502, 2002.; Johannsmann, F.: Messung und Modellierung der elektromagnetischen Beeinflussung mikroel...

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Computation of Electrostatic Fields in Anisotropic Human Tissues U...

By: V. C. Motresc; U. Van Rienen

Description: Institute of General Electrical Engineering, University of Rostock, Germany. The exposure of human body to electromagnetic fields has in the recent years become a matter of great interest for scientists working in the area of biology and biomedicine. Due to the difficulty of performing measurements, accurate models of the human body, in the form of a computer data set, are used for computations of the fields inside the body by employing numerical metho...

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Visibility of Type III Burst Source Location as Inferred from Ster...

By: P. H. M. Galopeau; H. O. Rucker; M. Maksimovic; M. Y. Boudjada

Description: Space Research Institute, Austrian Academy of Sciences, Graz, Austria. We study solar Type III radio bursts simultaneously observed by RPWS/Cassini, URAP/Ulysses and WAVES/Wind experiments. The observations allows us to cover a large frequency bandwidth from 16 MHz down to a few kHz. We consider the onset time of each burst, and estimate the corresponding intensity level. Also we measure the Langmuir frequency as observed on the dynamic spectra recorde...

Bonnin, X., Hoang, S., and Maksimovic, M: The directivity of solar type III bursts at hectometer and kilometer wavelengths: Wind-Ulysses observations, Astron. Astrophys., 489, 419–427, 2008.; Boudjada, M. Y., Macher, W., Rucker, H. O., and Fischer, G.: Solar Orbiter: Physical aspects towards a better knowledge of the solar corona, Adv. Space Res., 36, 1439, doi:10.1016/j.asr.2005.05.118, 2005.; Bougeret, J.-L., Kais...

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