Ondrej Fiser, Ph.D., M.Sc.

Associate Professor    

born: in Prague, 1952

Education:

Czech Technical University, Faculty of Electrical Engineering in Prague

(specializing in the Antennas, Radiowave propagation, Microwaves and in the Theory of Electromagnetic Field):

(i)  graduated and title "Master of Electrical Engineering" received in 1977, diploma work:"Microstrip 

     Resonator"

(ii) Ph.D. degree received in 1986, thesis: "Interaction of Electromagnetic Field with Rain

     Medium with Respect to Satellite Links Rain Attenuation Prediction"

Senior lectureship thesis „Influence of Rain on Reliability  of Radiocommunications“ defended

at the University of Pardubice  in 2004, the title „Associate Professor“ was received

Fellowships and Trainings:

*Two fellowships on "Radiowave Propagation through the Atmosphere" (on satellite links) at the Politecnico di Milano, Electronic and Information Department (Italy) in 1989 as well as in 1997

*Fellowship on "Radiowave Propagation in the Rain Volume" at the Helsinki University of Technology ,Faculty of Electrical Engineering, Radio Laboratory (Finland) in 1996

*Two trainings on "Radar Meteorology" at the University of Essex - Department of Mathematics (UK) and at the DLR (Oberpfaffenhofen), Germany ("Herbstschule der Radarmeteorologie"), both in 1995

*Participations in the COST75 "Short Term Scientific Mission" at the Institute of Atmospheric Physics of the DLR (Germany) in 1997 (theme: "Evaluation of Distrometer Data, Comparison with Radar") and in the COST255 "Short Term Scientific Mission" at the Fondazione Ugo Bordoni , (Radiocommunication Division,-Radiopropagation Group) in Roma in 1999 (theme: "Review of Atmospheric Attenuation Models for Ku and V Bands")

*Fellowship at the Rutherford Appleton Laboratory (Radio Communications Research Unit - Radar Group) in Chilton-Didcot,UK in 1999 (theme "Drop Size Distribution for the Improved Radio Propagation Modelling")

*Fellowship at the Univesity of Bath, Electronic and Electrical Engineering department in Bath (UK) in 2002, when the topic being  „The drop size distribution models for various frequencies“

Language certificates: 

English:  Language Certificate from the Czech Inst. of Foreign Trade,Prague, 1988 

                First Certificate in English (FCE), British Council, 2001 

Other language skills: German, Russian

Employments:

scientific - technical researcher at the PTT Research Institute (since 1993 TESTCOM ) in Prague - he worked within the Satellite Communication Laboratory (1978-1994)

scientific researcher at the Institute of Atmospheric Physics of the Academy of Sciences of the Czech Republic (dept.of Meteorology , since 1995)

Visiting lecturer on

(i) the "Electromagnetic Field Theory" at the Czech Technical University (since 1990)

(ii) the „Electrotechnique and Measurement“ at the Jan Perner Transport Faculty of the

     University of  Pardubice (since 2001)

(iii) English for the Telecommunications Industry" at the CZECH TELECOM (1993-1994)

(iv) the Mathematics (private teaching)

Grants:

1. Processing and mapping of meteorological parameters for radiowave propagation

    modelling through troposphere“

            Grant Nr.  205/96/1555 of the Czech Science Foundation, Grant holder (1996-1998)

2. Performance and reliability of advanced telecommunication systems using millimetre     

     wavelengths in the Czech Republic

            Grant Nr.  102/01/0029 of the Czech Science Foundation, Grant co-holder (2001-2003)

3. Time-space simulations of MWS systems in 42 GHz Band.

            Grant Nr.  102/04/2153  of the Czech Science Foundation, Grant co-holder (2004-2006)

4.  Methods improving optical link reliability

            Grant Nr.  102/05/0571 of the Czech Science Foundation, Grant co-holder (2005-2007)

5.  Advanced Communication Techniques for Atmospheric Transmission Channel (Pokročilé komunikační techniky pro atmosférický optický kanál )

            Grant Nr.  102/08/0851 of the Czech Science Foundation, Grant co-holder (2008-2010)

International Activities:

INTERKOSMOS (1984-1991)

OPEX (Olympus Propagation Experiment, 1991-1994)

COST project 235 (1991-1993)

PADRE - CEC Environment Programme  (Polarisation and Doppler Radar Experiment)

1994-1995

COST project 255 -  "Radiowave propagation modelling for new satellite communication services at Ku-band and above"

Management Committee member, Chairman of the 1a subgroup "Diurnal Variations",1996 - 2000

RADHYD project (Exchange of Ideas and Development of Algorithm for Estimating Precipitation by Radar for Operational Applications in Meteorology and Hydrology, 1995-1997)

COST project 280 "Propagation Impairment Mitigation for Millimetre Wave Radio Systems" Management Committee member, 2001-2005

Recent publications:

• Fišer O., Schoenhuber M, Pešice P.: "First results of DSD measurement by videodistrometer in the Czech Republic in 1998-1999" Studia Geophysica et Geodetica,46, 3, 2002, pp. 485-506
  Abstract:
  The first results of the almost one year drop size distribution (DSD) measurement in the Czech Republic are summarised in this study. The ESA-ESTEC 2D videodistrometer was used to measure the rain drop parameters. The average DSD is shown to be of the gamma type. One minute DSDs were evaluated to test the accuracy of analytical DSD models. Parameters of gamma distribution and exponential distribution functions were evaluated for the whole data set as well as for the various rain rate intervals. Regression technique and the method of moments were applied to estimate the parameters of DSD. It is shown that the m parameter value strongly depends on the method of computation as well as on the rain type. Its average value is about 0.59 for the average (smooth) one minute DSD while an average value of un-smoothed DSD is 11.0 (moment method) or 5.4 (regression technique). The Joss's shape parameter and the Tokay-Short's parameter CS estimating roughly the rain type are also discussed (if CS>1, the event should be convective). The tendency of increasing numerical value of the CS parameter with the increasing rain rate was observed and thus the idea of the convectivity occurrence bounded with the higher CS parameter value was supported. The study also compares the parameters of the average DSD with the averages of parameter values of all 4 183 one minute DSDs.
• Fišer O.: "Space Diversity Gain Estimated from Rain Rate Records," Radioengineering, , Vol.12,No.1, 2003, str.8-11
• Fišer O., Řezáčová D.: "Diurnal and Seasonal Variations of Water Vapour and Cloud Vapour Attenuation in Microwave Frequency Bands," Radioengineering, Vol. 6, No. 3, 1997, pp. 1-5
• Fišer O.: "Prediction of Rain and Water Vapour Attenuation at Frequencies 10-30 GHz, Radioengineering ," Vol. 5,No.3, 1996, pp. 18-22
• Řezáčová D, Fišer O., Ramon Sáez L.: "Statistics of the Radio Refractivity Derived from Prague-Libus Radiosounding Data Radioengineering," Vol.12, No.4, 2003, pp 84-88
• Fišer O.: "The role of particular rain drop size classes on specific rain attenuation at various frequencies with Czech data example," ERAD02 series, Delft(NL), 17.-22.November 2002, pp 1-4
• Fišer, O.: "Z-R (Radar Reflectivity-Rain Rate) Relationships Derived from Czech Distrometer Data." In Proc. of the ERAD Conference, Visby, Sweden, 2004, pp. 233-236
• Boumis, M., Fišer, O., Martellucci, O., Marzano, F., Watson, P., Wrench, C.: "Propagation effects due to atmospheric gases and clouds." Chapter 2.1 in the "Radio Wave Propagation Mofelling for SatCom Services at Ku-band and Above, "Final Report COST 255, ESA, SP-1252, March 2002, pp 1- 41
• Chisalita, I., D'Amico, M, Fišer, O., Gremont, B., Hajny, M., Marzano, F., Palade, T., Riva, C: "Rain Attenuation" (Edited by O. Fišer), Chapter 2.2 in the "Radio Wave Propagation Mofelling for SatCom Services at Ku-band and Above, "Final Report COST 255, ESA, SP-1252, March 2002, pp 1- 62
• Boumis, M., Chisalita, I., Fišer, O., Gimonet, E., Lemorton, J., Martellucci, A., Palade, T., Riva, C., Salonen, E.T., van der Kamp, M., : "Testing of prediction models" Chapter 2.6in the "Radio Wave Propagation Mofelling for SatCom Services at Ku-band and Above," Final Report COST 255, ESA, SP-1252, March 2002, pp 1- 39
• Fišer O.: "On Impact of Drop Size Distribution Models on Radar Measurement" Proc. of AMS "30th International Conference on Radar Meteorology,",Munchen, 19-24 July 2001,pp. 556-558
• Fišer, O., Hagen, M.: "Analysis of Distrometer Data" COST-75 Final International Seminar "Advanced Weather Radar Systems," Proc.: "14 papers on Precipitation Estimates by Radar and on Analyses for Weather-Forecasting." Swiss Meteorological Institute, Locarno, 1998 , pp. 21-33
• Fišer O.: "Examples of rain gauge data analysis for microwave rain attenuation estimation" Doc. PM9-114, COST280 Final Workshop, Prague, June 2005, pp 1-4 on http://www.cost280.rl.ac.uk/documents/WS3%20Proceedings/documents/pm-9-114.pdf
  Abstract:
  This contribution shows some examples of rain data processing aiming at the radiowave propagation research and fade mitigation technique. The cumulative rain rate distribution, distribution of fade and interfade duration is presented. The mutual correlation, symmetry and excludivity in pairs of measurement sites is shown, new parameters as symmetry and excludivity are defined. The example of the site diversity gain is added. The long term rain rate series stability (63 years) is also studied.
• Schejbal , V., Fišer, O., Čermák, D., Němec, Z.: "Electromagnetic wave propagation through obstacles" Proc. of International Workshop on Microwaves, Radar and Remote Sensing MRRS 2005 (in the framework of the World Congress "Safety of Aviation"), Kyjev, Ukraine, 19. - 21. 9. 2005, pp 255-260
  Abstract:
  The propagations of electromagnetic waves through obstacles is analyzed. Narrow band and ultra wide band (UWB) propagations are compared. It is shown that for propagation studies it is necessary to consider not only propagation for a single frequency (narrow band propagation). Also UWB signals and effect of antenna receiving and transmitting responses for various antenna types (such as small and aperture antennas) have to be considered.
• Čermák, D., Fišer, O.,Němec, Z., Schejbal , V.: "Study of electromagnetic scattering by rain drops." Proc. of the 10th International Conference on Mathematical Methods in Electromagnetic Theory, MMET 04. Dniepropetrovsk, Ukraine: 2004, pp. 592-594.
  Abstract:
  The paper analyses the electromagnetic scattering by rain drops. Rain possesses drop size distribution of various diameters from 0.1 to 7 mm. Water drops are created by material, which can be considered as lossy dielectric and therefore, both reflected and transmitted waves have been analysed.

Honors:

medal of Int. Exp. Satellite Center Dubna-Interkosmos (1985)

Professional Interests:

**  radiowave propagation through the atmosphere

**  radar meteorology

and also radioclimatology, computer programming, teaching.

Hobbies: philosophy, water sports (especially windsurfing),

              dancing (especially american country dancing)

e-mail address: ondrej[AT]ufa.cas.cz

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