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Optical Matrix Device: Technical Aspects of a New Tool for the Detection and Recording of Small Nocturnal Aerial Targets

Published online by Cambridge University Press:  22 December 2008

Michael Vorotkov ,
Alexandra Sinelschikova  and
Martin Griffiths
Michael Vorotkov
Affiliation:
(Pulkovo Observatory, Saint-Petersburg)
Alexandra Sinelschikova*
Affiliation:
(Biological Station Rybachy, Russia)
Martin Griffiths
Affiliation:
(Durrell Institute of Conservation and Ecology, University of Kent)
*
(Email: Sinelsch@bioryb.koenig.ru)
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Abstract

The detection of flying targets in the night sky has provided interest for bird migration research over many years with methods largely dependent on moon watching or the use of radar and infrared camera. These methods lack the versatility of the system described in this paper which detects and automatically records aerial targets in the night sky of a size greater than 5 cm and at a distance of 100 to 1000 metres from the observer. The principle design features are first, an optical device for receiving images of targets on two high-sensitivity CCD matrices when illuminated by white light from searchlight beams and secondly, instantaneous parallactic electronic computation enabling the distance from device to target to be accurately measured, and sequential images of each target to be recorded to computer. The device has been tested on targets during the main seasonal nocturnal migration of birds and provides accurate image details of important target flight parameters including: altitude, linear size (wing span and body length), direction of flight (ground track), orientation of the body axis – heading, ground speed, wing-beat frequency, number of wing-beats in each series of beats, duration of the pause between each series of wing-beats, and type of flight trajectory. There are also the potential practical applications for aviation bird-strike at night as well as the remote monitoring of insects, bats and other targets of natural and artificial origin.

Keywords

Electronic-optical deviceNocturnal bird migration
Type
Research Article
Information
The Journal of Navigation , Volume 62 , Issue 1 , January 2009 , pp. 23 - 32
Copyright
Copyright © The Royal Institute of Navigation 2008

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References

REFERENCES

Able, K.P. and Gauthreaux, S.A. Jr. (1975). Quantification of nocturnal passerine migration with a portable ceilometer. Condor, 77, 92–96.CrossRefGoogle Scholar
Alerstam, T. and Gudmundsson, G.A. (1999). Migration patterns of tundra birds: Tracking radar observations along the Northeast Passage. Arctic, 52, 346–371.CrossRefGoogle Scholar
Baushev, A.N. and Sinelschikova, A. (2007). On a probabilistic model for the numerical estimation of nocturnal migration of birds. Mathematical Bioscience, 205, 44–58.CrossRefGoogle ScholarPubMed
Berthold, P. (2001). Bird Migration: a general survey (2nd ed). Oxford University Press, Oxford.CrossRefGoogle Scholar
Bolshakov, C. (1985). Moon-watch method for quantitative studying of nocturnal bird passage (collection, calculation and analysis of data). pp. 260–294. In: Dolnik, V. (Ed.), Spring nocturnal bird passage over arid and mountain areas of Middle Asia and Kazakhstan, Academy of Sciences, Leningrad.Google Scholar
Bolshakov, C., Žalakevičius, M. and Švažas, S. (2002). Nocturnal migration of thrushes in the Eastern Baltic region. Vilnius.Google Scholar
Bruderer, B. (1999). Three decades of tracking radar studies on bird migration in Europe and the Middle East. Proceedings of the International Seminar on Birds and Flight Safety in Middle East, Tel-Aviv, Israel.Google Scholar
Bruderer, B. and Jenni, L. (1990). Migration across the Alps. Pp 60–77. In Gwinner, E. (Ed), Bird migration: the physiology and ecophysiology, Springer-Verlag, Berlin.CrossRefGoogle Scholar
Bruderer, B. and Bold, A. (2001). Flight characteristic of birds: I. radar measurements of speed. Ibis, 143, 178–204.CrossRefGoogle Scholar
Curry-Lindahl, K. (1982). Das große Buch vom Vogelzug. Parey, Berlin.Google Scholar
Gauthreaux, S.A. Jr. (1969). A portable ceilometer technique for studying low-level migration. Bird banding, 40, 309–320.CrossRefGoogle Scholar
Gauthreaux, S.A. Jr. (1974). The detection, quantification, and monitoring of bird movements aloft with airport surveillance radar (ASR). Proceedings of a Conference on the Biological Aspects of the Bird–Aircraft Collision Problem (Gauthreaux, S. A. Jr. Ed.), Clemson University, Clemson, South Carolina.Google Scholar
Gauthreaux, S.A. Jr. (1992). The use of weather radar to monitor long-term patterns of trans-Gulf migration in spring. Pages 96–100 in Ecology and Conservation of Neotropical Migrant Landbirds (Hagan, J. M. III and Johnston, D. W. Eds.), Smithsonian Institution Press, Washington, D.C.Google Scholar
Gauthreaux, S.A. Jr. and Belser, C.G. (2003). Radar ornithology and biological conservation. The Auk, 120 (2), 266–277.CrossRefGoogle Scholar
Gauthreaux, S.A. Jr. and Livingston, J.W. (2006). Monitoring bird migration with a fixed-beam radar and a thermal-imaging camera. J. Field Ornithology, 77(3), 319–328.CrossRefGoogle Scholar
Hansen, L. (1954). Birds killed at lights in Denmark 1886–1939, Vidensk. Medd. naturh. Foren., Kopenhagen, 116, 269–368.Google Scholar
Lack, D., and Varley, G.C. (1945). Detection of birds by radar. Nature, 156, 446.CrossRefGoogle Scholar
Liechti, F. (2001). Calibrating the moon-watching method – chances and limits. Avian ecology and behaviour, 7, 27–40.Google Scholar
Liechti, F. (2007). Radar ornithology – past experiences and future challenges. Proceedings of the 6th Conference of the European Ornithologists' Union, Vienna.Google Scholar
Martin, G. (1990). Birds by night. London: T&AD Poyser.Google Scholar
Moreua, R.E. (1972). The Palaearctic-African bird migration systems. Academic Press, London.Google Scholar
Richardson, W.J. (1979). Radar techniques for wildlife studies. National Wildlife Federation Scientific Technical Series, 3, 171–179.Google Scholar
Schaefer, G.W. (1968). Bird recognition by radar: A study in quantitative radar ornithology. Pages 53–86 in The Problems of Birds as Pests (Murton, R. K. and Wright, E. N. Eds.), Academic Press, London.Google Scholar
Taylor, W.K. (1972). Analysis of Ovenbirds killed in central Florida. Bird-Banding, 43, 15–19.CrossRefGoogle Scholar
Vorotkov, M., Sinelschikova, A. and Griffiths, M. Advantages of Optical Matrix System for the detection and identification of nocturnally migrating birds. In preparation.Google Scholar
Zehnder, S., Åkesson, S., Liechti, F. and Bruderer, B. (2001). Nocturnal autumn bird migration at Falsterbo, South Sweden. J. of Avian Biology, 32, 239–248.CrossRefGoogle Scholar