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Passive unmanned sky spectroscopy for remote bird classification

Author:
  • Patrik Lundin
  • Mikkel Brydegaard
  • Lorenzo Cocola
  • Anna Runemark
  • Susanne Åkesson
  • Sune Svanberg
Publishing year: 2011
Language: English
Publication/Series: Remote Sensing For Agriculture, Ecosystems, And Hydrology XIII
Volume: 8174
Document type: Conference paper
Publisher: SPIE

Abstract english

We present a method based on passive spectroscopy with aim to remotely study flying birds. A compact spectrometer is continuously recording spectra of a small section of the sky, waiting for birds to obscure part of the field-of-view when they pass the field in flight. In such situations the total light intensity received through the telescope, looking straight up, will change very rapidly as compared to the otherwise slowly varying sky light. On passage of a bird, both the total intensity and the spectral shape of the captured light changes notably. A camera aimed in the same direction as the telescope, although with a wider field-of-view, is triggered by the sudden intensity changes in the spectrometer to record additional information, which may be used for studies of migration and orientation. Example results from a trial are presented and discussed. The study is meant to explore the information that could be gathered and extracted with the help of a spectrometer connected to a telescope. Information regarding the color, size and height of flying birds is discussed. Specifically, an application for passive distance determination utilizing the atmospheric oxygen A-band absorption at around 760 nm is discussed.

Keywords

  • Biological Sciences
  • Atom and Molecular Physics and Optics
  • Remote sensing
  • passive optical spectroscopy
  • bird migration
  • bird
  • classification
  • diurnal migration
  • Fraunhofer line discrimination

Other

Conference on Remote Sensing for Agriculture, Ecosystems, and Hydrology XIII/18th International Symposium on Remote Sensing
Published
  • ISSN: 1996-756X
  • ISSN: 0277-786X
Mikkel Brygdegaard
E-mail: mikkel [dot] brydegaard [at] forbrf [dot] lth [dot] se

Associate senior lecturer

Combustion Physics

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Centre for Animal Movement Research
Evolutionary Ecology, Department of Biology
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