Agricultural Insect Pest Monitoring LIDAR
FaunaPhotonics light Detection and Ranging (LIDAR) is a technology for profiling the atmosphere for aerial fauna. The system transmits a laser beam into the atmosphere and measures the backscattered laser light from birds and insects. The portable in-field sensor system with wireless connectivity enables automation of manual processes to improve efficiency and accuracy.
Agricultural intensification and pesticide use has profound effects on aerial ecology. However, impact on the composition of aerial fauna is not well understood given limitations in monitoring technologies. FaunaPhotonics aims to change this with optical remote sensing that can quantify aerial insect fauna associated with land use, farming regimes and crop type in agricultural landscapes. Further, the method has great potential in identifying effects of insecticides on pest control and in relation to pollinators.
Today a major limitation in monitoring malaria mosquitoes is that insect abundance assessment is based on insect traps. Placing and emptying the traps are tedious operations and constitute a major effort, and the results are biased with respect to the species, sexes and age groups caught. Our kHz laser radar surveillance technology enables non-intrusive on site monitoring of malaria mosquitoes improving decision support for national malaria control programs.
A challenging task in bird monitoring lies in identifying high-altitude migrating bird species and genders. Spectral or polarimetric analysis of light has the potential for retrieval of additional information whereby species and sex can be determined.
Light Detection and Ranging (LIDAR), resembles radar and sonar but exploits light. LIDAR both detects the back- and forward scattered magnitude as well as the range. LIDAR varies in complexity where the simplest versions have one color and detects backscattered light, others are multiband, several polarisations or retrieve fluorescence or Raman signals. It is possible to reconfigure LIDAR with successive addition of more bands and polarisation modes. FaunaPhotonics LIDAR's have sampling rates that enable retrieval of insect wing beat frequencies and harmonics spectrum.Data analysis
LIDAR echoes can be analyzed in terms of spectral, modulation and polarization content. Remotely recorded signals either arise from scattered sunlight or backscattered laser radiation. Data is evaluated with frequency analysis and chemometric methods and information retrieved can include species, gender, age, position, heading or payload. LIDAR allows assessment of fast oscillatory insect wing-beats and harmonics over kilometers range e.g. for mosquito species identification and surveying distribution of insects in the field. In recent field campaigns up to 240.000 insect events have been recorded in a single day.