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Algorithmic System for Identifying Bird Radio-Echo and Plotting Radar Ornithological Charts

Leonid Dinevich
  • George S. Wise Faculty of Natural Sciences, Dept. of Zoology, Tel-Aviv University, Ramat Aviv, 69978, Israel
/ Yossi Leshem
  • George S. Wise Faculty of Natural Sciences, Dept. of Zoology, Tel-Aviv University, Ramat Aviv, 69978, Israel
Published Online: 2009-07-22 | DOI: https://doi.org/10.2478/v10050-008-0040-z

Algorithmic System for Identifying Bird Radio-Echo and Plotting Radar Ornithological Charts

The territory of Israel is a route for major bird migration from Europe and certain areas in Asia and Africa and back. During the period of intensive migration, the average density of birds may reach over 500 birds per a square kilometre of the air. These figures, alongside with the fact the air over the country is saturated with aircraft, makes it an urgent task to find solutions for prevention of disasters caused by aircraft-bird collisions.

In the present paper, a new algorithm is proposed aimed at identifying bird radar echoes against the background of other reflectors. The implementation of the algorithm has made it possible to improve the computerised radar system for bird monitoring developed earlier in Israel on the basis of MRL-5 meteorological radar station. The time needed for echo selection has been significantly reduced, while the trustworthiness of the ornithological data provided by the algorithm has increased. The new algorithm utilizes several echo properties that have been added to the algorithm previously developed by the authors, the most important of them being the pattern of echo movement. These properties in combination with a set of techniques used for their identification enabled to isolate the echo from moving birds against the background of other objects (ground clutter, clouds, atmospheric inhomogeneities, aircraft, etc.) at the accuracy level sufficient for operational purposes. The information on echo movement was used for plotting flight vectors (velocity and direction) of individual birds and bird groups. On the basis of movement pattern, four types of movement were distinguished: straightforward at non-uniform velocity; straightforward at uniform velocity; significant deviation from a straight line, non-uniform velocity and chaotic undirected shifts. The system enables on-line plotting of operational ornithological charts every 15-30 min, including charts that combine meteorological and bird monitoring data, to be provided to air traffic control services. This makes the proposed radar ornithological system an efficient means of maintaining air traffic safety in complicated meteorological and ornithological conditions.

Keywords: radar ornithology; radar meteorology; radio-echo; birds; bird migration; ornithology; air traffic safety

  • Abshayev M., Burtsev I., Vaksenburg S., Shevela G. 1980. [Guide for use of the MRL-4, MRL-5 and MRL-6 radars in urban protection systems.] Hydrometeoizdat, Leningrad. (In Russian).

  • Abshayev M., Kaplan L., Kapitannikov A. 1984. [Form reflection of meteorologic targets at the primary processing of the meteorologic radar signal.] Transactions of VGI 55. (In Russian).

  • Alpert P., Tannhauser D.S., Leshem Y., Kravitz A., Rabinovitch-Hadar M. 2000. Migrating soaring birds align along sea-breeze fronts; First evidence from Israel.Bull. Am. Meteorol. Soc. 81, 7: 1599-1601.

  • Atlas D. 1964. Advances in Radar Meteorology.Adv. Geophys. 10: 318-468.

  • Bahat O., Ovadia O. 2005. Minimizing Bird-Aircraft Collisons Caused by Resident Raptors in Israel. IBSC 27th Meeting, Athens, Hellas, 23-27 May 2005: p. 178.

  • Bruderer B., Joss J. 1969. Zur Registrierung and Interpretation von Echosingnaturen an enema 35 cm-Zielvervolgungstradar.Orn. Beob. 66: 70-88.

  • Bruderer B. 1992. Radar studies on Bird migration in the south of Israel. BSCE/21, Jerusalem: pp. 269-280.

  • Bruderer B., Liechti F. 1995. Variation in density and height distribution of nocturnal migration in the south of Israel.Isr. J. Zool. 41, 3: 477-489.

  • Bruderer B. 1997. Migratory directions of birds under the influence of wind and topography. RIN Symposium Orientation & Navigation - Birds, Humans & other animals. Oxford. 27/1-10.

  • Buurma L. 1999. The Royal Netherlands Air Force: Two Decades Of Bird Strike Prevention "En Route". International Seminar on Birds and Flight Safety in the Middle East, Israel, April, 25-26, 1999: pp. 71-83.

  • Chernikov A., 1979. [Radar clear sky echoes.] Hydrometeoizdat, Leningrad: 3-40. (In Russian).

  • Chernikov A., Schupjatsky A. 1967. [Polarization characteristics of radar clear sky echoes.] Transactions of USSR academy of sciences, atmosphere and ocean physics 3, 2: 136-143. (In Russian).

  • Dinevich L., Kapitalchuk I., Schupjatsky A. 1994. [Use of the polarization selection of radar signals for remote sounding of clouds and precipitation.] 34th Israel Annual Conference on Aerospace Science: pp. 273-277.

  • Dinevich L., Leshem I., Gal A., Garanin V., Kapitannikov A. 2000. Study of birds migration by means of the MRL-5 radar. Sci. Isr. - Technol. Adv. 4.

  • Dinevich L., Leshem Y., Pinsky M., Sterkin A. 2004. Detecting birds and estimating their velocity vectors by means of MRL-5 meteorological radar.Ring 26, 2: 35-53.

  • Eastwood E. 1967. Radar ornithology. Methuen, London: 278.

  • Edwards J., Houghton E.W. 1959. Radar echoing area polar. Diagrams of birds.Nature 184, 4692.

  • Doviak R., Zrnic D. 1984. Doppler Radar and Weather Observation. Acad. Press: 512 pp.

  • Ganja I., Zubkov M., Kotjazi M. 1991. [Radar ornithology.] Stiinza, pp. 123-145. (In Russian).

  • Gauthreaux S.A., Belser C.G. 2003. Radar ornithology and biological conservation.Auk 120, 2: 266-277.

  • Gauthreaux S.A., Sidney A. Jr., Mizrahi D.S., Belser C.G. 1998. Bird Migration and Bias of WSR-88D Wind Estimates.Weather and Forecasting 13: 465-481. [Crossref]

  • Glover K., Hardy K. 1966. Dot angels: insects and birds. Proc. 12th Weather Radar Conf., Amer. Met. Soc., Boston, 1966: pp. 264-268.

  • Gudmundsson G.A., Alerstam T., Green M., Hedenström A. 2002. Radar observations of Arctic bird migration at the Northwest Passage, Canada.Arctic 55, 1: 21-43.

  • Hajovsky R., Deam A., La Grone A. 1966. Radar reflections from insects in the lower atmosphere.IEEE Trans. on Antennas and Propagation 14: 224-227.

  • Hardy K.R., Katz I. 1969. Probing the Atmosphere with High Power, High Resolution Radars. Panel on Remote Atmospheric Probing of the National Academy of Sciences, Chicago, Ill.

  • Houghton E 1964. Detection, recognition and identification of birds on radar. World conf. Radio Met., Amer. Met. Soc., Boston: pp. 14-21.

  • Komenda-Zehnder S., Liechti F., Bruderer B. 2002. Is reverse migration a common feature of nocturnal bird migration. An analysis of radar data from Israel.Ardea 90, 2: 325-334.

  • Kropfli R.A. 1970. Simultaneous radar and instrumented aircraft observations in a clear air turbulent layer. Prepr. 14th Radar Met. Conf., Amer. Met. Soc., Boston: pp. 117-120.

  • Larkin R.P., Evans W.R., Diehl R.H. 2002. Nocturnal flight calls of Dickcissels and Doppler radar echoes over south Texas in spring.J. Field Ornithol. 73, 1: 2-8.

  • Leshem Y., Gauthreaux S.A. 1996. Proposal to develop a global network to predict bird movements on a real-time and daily scale by using radars. Bird Strike Committee Europe BSCE-23/WP 50. London, May 13-17, 1996.

  • Leshem Y., Yom-Tov Y. 1996. The use of thermals by soaring migrants in Israel.Ibis 138: 667-674.

  • Leshem Y., Yom-Tov. Y. 1998. Routes of migrating soaring birds.Ibis 140: 41-52.

  • Lofgren G., Battan L. 1969. Polarization and vertical velocities of dot angel echoes.J. Appl. Met. 1969: 948-951.

  • Miller M.A., Verlinde J., Gilbert C.V., Lehenbauer G.J., Tongue J.S., Clothiaux E.E. 1998. Detection of nonprecipitating clouds with the WSR-88D: a theoretical and experimental survey of capabilities and limitations.Weather and Forecasting 13, 4: 1046-1062. [Crossref]

  • Richardson W.J., West T. 2005. Serious Birdstrike Accidents to U.K. Military Aircraft, 1923 to 2004: Numbers and Circumstances. IBSC 27th Meeting, Athens, Hellas, 23-27 May 2005: p. 5.

  • Russell K.R., Gauthreaux S.A. 1998. Use of weather radar to characterize movements of roosting purple martins.Wildl. Soc. Bull. 26, 1: 5-16.

  • Schupjatsky A. 1959. [Radar dispersion by non-spherical particles.] CAO Tr. 30: 39-52. (In Russian).

  • Skolnik M. 1970. Radar handbook. McGraw-Hill Book Company.

  • Stepanenko V. 1973. [Radar in meteorology.] Hydrometeoizdat, Leningrad. (In Russian).

  • Thorpe J. 2005. Fatalities and Destroyed Civil Aircraft Due to Bird Strikes, 2002 to 2004 (with an Addendum of Animal Strikes). IBSC 27th Meeting, Athens, Hellas, 23-27 May 2005: pp. 17-24.

  • Venema V., Russchenberg H. 2000. Clear-air scattering observations: downdraft and angels.Physics and Chemistry of the Earth. B: Hydrology 25, 10-12: 1123-1128.

  • Zavirucha V., Saricev V., Stepanenko V, Shepkin U., 1977. [Study of the dispersion characteristics of the meteorological and ornitological objects in echo-free cameras.] Proc. Main Geophysic Observatory 395: 40-45. (In Russian).

  • Zrnic D.S., Ryzhkov A.V. 1998. Observations of insects and birds with a polarimetric radar.IEEE Transactions on Geoscience and Remote Sensing 36, 2: 661-668. [Crossref]

About the article

Published Online: 2009-07-22

Published in Print: 2007-01-01

Citation Information: Ring, ISSN (Print) 0035-5429, DOI: https://doi.org/10.2478/v10050-008-0040-z. Export Citation

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