title: Towards Quantitative Optical Cross Sections in Entomological Laser Radar - Potential of Temporal and Spherical Parameterizations for Identifying Atmospheric Fauna.
abstract: In recent years, the field of remote sensing of birds and insects in the atmosphere (the aerial fauna) has advanced considerably, and modern electro-optic methods now allow the assessment of the abundance and fluxes of pests and beneficials on a landscape scale. These techniques have the potential to significantly increase our understanding of, and ability to quantify and manage, the ecological environment. This paper presents a concept whereby laser radar observations of atmospheric fauna can be parameterized and table values for absolute cross sections can be catalogued to allow for the study of focal species such as disease vectors and pests. Wing-beat oscillations are parameterized with a discrete set of harmonics and the spherical scatter function is parameterized by a reduced set of symmetrical spherical harmonics. A first order spherical model for insect scatter is presented and supported experimentally, showing angular dependence of wing beat harmonic content. The presented method promises to give insights into the flight heading directions of species in the atmosphere and has the potential to shed light onto the km-range spread of pests and disease vectors.
authors: Lund Laser Center, Department of Physics, Lund University, Sölvegatan 14, SE 223 62, Lund, Sweden; Centre for Animal Movement Research, Department of Biology, Lund University, Sölvegatan 37, SE 223 62, Lund, Sweden; Hyspex, Norsk Elektro Optikk A/S, Prost Stabels Vei 22, N-2019, Skedsmokorset, Norway.
authors: Mikkel
authors: M
authors: Brydegaard
mesh_terms: D000818:Animals; D001272:Atmosphere / Q000032:analysis; D001696:Biomechanical Phenomena; D005426:Flight, Animal / Q000502:physiology*; D007300:Insect Control; D007303:Insect Vectors / Q000033:anatomy & histology / Q000472:pathogenicity / Q000502:physiology*; D007313:Insecta / Q000033:anatomy & histology / Q000472:pathogenicity / Q000502:physiology*; D007834:Lasers; D058998:Remote Sensing Technology / Q000295:instrumentation*; D014921:Wings, Animal / Q000033:anatomy & histology / Q000502:physiology