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Calibrating the Operational Beam Width and Maximum Range of a Ship Radar Used for Bird Observations

Published online by Cambridge University Press:  23 February 2010

Gudrun Hilgerloh ,
Tanja Caprano  and
Eva Maria Griebeler
Gudrun Hilgerloh*
Affiliation:
(University of Mainz, Germany)
Tanja Caprano
Affiliation:
(University of Mainz, Germany)
Eva Maria Griebeler
Affiliation:
(University of Mainz, Germany)
*
(Email: gudrun.hilgerloh@t-online.de)
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Abstract

In order to analyse quantitative radar observations of bird movements, one needs to know the dimensions of the air space surveyed by the radar. The present study shows how to calibrate the operational beam width and the maximum range of any radar for cross sections for different body sizes of songbirds. The trial used an X-band fan beam ship radar of 25 KW (Furuno Fr-2125) and a captive balloon. Metal spheres of different diameters, fastened to the bottom of the balloon at defined distances, corresponding to the radar cross sections of song birds, were moved in all three dimensions of the air space. Simultaneously to the location by radar, the position of the suspended sphere was measured by theodolites.

Keywords

Ship radarBeam widthCalibrationSongbirds
Type
Research Article
Information
The Journal of Navigation , Volume 63 , Issue 2 , April 2010 , pp. 363 - 371
Copyright
Copyright © The Royal Institute of Navigation 2010

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References

REFERENCES

Bäckman, J. & Alerstam, T. (2001). Confronting the winds: orientation and flight behaviour of roosting swifts, Apus apus. – Proc. R. Soc. Lond. B 268, 1081–1087.CrossRefGoogle Scholar
Becker, J. & van Raden, H. (1985). Grundlagen der Radarornithologie und Ergebnisse der Radarvogelzugbeobachtung in München 1981–1983. – Vogel und Luftverkehr, Sonderheft1, Traben-Trarbach, 63 pp.Google Scholar
Bloch, R., Bruderer, B. & Steiner, P. (1981). Flugverhalten nächtlich ziehender Vögel. Radardaten über den Zug verschiedener Vogeltypen auf einem Alpenpass. Vogelwarte 31, 119–148.Google Scholar
Bruderer, B. (1969). Zur Registrierung und Interpretation von Echosignaturen an einem 3-cm-Zielverfolgungsradar. Ornithologischer Beobachter 66, 70–88.Google Scholar
Bruderer, B. & Joss, J. (1969). Methoden und Probleme der Bestimmung von Radarquerschnitten frei fliegender Vögel. Rev. Suisse Zool. 76, 1106–1118.CrossRefGoogle Scholar
Bruderer, B. , B. & Liechti, F. (1994). Quantification of bird migration – different means compared. Bird Strike Committee Europe 22/WP 33, 243–254.Google Scholar
Bruderer, B., Steuri, T & Baumgartner, M. (1995). Short-range high-precision surveillance of nocturnal migration and tracking of single targets. Israel Journal of Zoology, 41: 207–220.Google Scholar
Buurma, L. & Bruderer, B. (1990). The application of radar for bird strike reduction. Compiled for the Bird Strike Committee Europe (radar working group), Koninklijke Luchtmacht CLS/ALBV, Postbox 20703, 2500 ES The Hague, The Netherlands, 75 pp.Google Scholar
Cooper, B.A., Day, R.H., Ritchie, R. J. & Cranor, C.L. (1991). An improved marine radar system for studies of bird migration. J. Field Ornithol. 62, 367–377.Google Scholar
Edwards, J. & Houghton, E. W. (1959). Radar echoing area polar diagrams of birds. Nature, 184, 1059.CrossRefGoogle Scholar
Eastwood, E. (1967). Radar ornithology. Methuen, London, United Kingdom, 278 pp.Google Scholar
Gasteren, H.van Bell, J. & Buurma, L. S. (2002). Kwantificering van vogelbewegingen langs de kust bij Ijmuiden: een radarstudie. Ministerie van Verkeer en Waterstaat, Directie Nordzee, Den Haag, 117 pp.Google Scholar
Göbel, J. (2001). Radartechnik. Grundlagen und Anwendungen. VDE Verlag, Berlin, Offenbach, 242 pp.Google Scholar
Harmata, A.R., Podruzny, K.M., Zelenak, J.R. & Morrison, M.L. (1999). Using marine surveillance radar to study bird movements and impact assessment. Wildlife Society Bulletin 27, 44–52.Google Scholar
Hueppop, O., Exo, M. & Garthe, S. (2002). Empfehlungen für projektbezogene Untersuchungen möglicher bau- und betriebsbedingter Auswirkungen von Offshore-Windenergieanlagen auf Vögel. Ber. Vogelschutz 39, 77–94.Google Scholar
Skolnik, M. I. (1988) (ed): Introduction on radar systems. Auckland. McGraw-Hill 2nd Edition. ISBN 0-07-057909-2Google Scholar
Williams, T.C. (1984). How to use marine radar for bird watching. Am. Birds 38, 982–983.Google Scholar