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Technique > Cameras

L’Avion Jaune offers the latest data in high-resolution quality and easily accessible thanks to the use of innovative systems developed by in-house research and technology transfer.

Visible and near-infrared
L’Avion Jaune uses an array of digital cameras for image acquisition in the visible and near-infrared spectral bands. The infrared cameras have been professionally modified using tailored optical components capable of providing a satisfactory spectral response within the spectral range of 430–900nm. A number of dedicated filters enable us to carry out remote sensing, especially for agronomy:

  • Broadband infrared filter, 715nm-900nm
  • Infrared filter, 830-900nm
  • Special passband filters just 20nm wide


Illustration of relative spectral responses from an array of visible and near-infrared sensors (seven bands)

The calibration measurements of the multispectral sensors were defined in collaboration with the PELICAN sensor calibration team at the CERT-ONERA optics laboratory in Toulouse. These enable us to supply customers who wish to use our images for radiometric purposes with precise information about the spectral response of our sensors.

Thermal imaging
The images acquired by L’Avion Jaune in the Languedoc and on Reunion Island demonstrate the enormous potential of this data for characterizing water stress in crops. Thermal data is usually gathered by light aircraft given the weight of the thermal sensors that are required to deliver measures of sufficiently high quality. However, we are studying the possibility of integrating an uncooled microbolometer with a resolution of 640x400 into a UAV.

 


Why near-infrared?
Near-infrared (PIR) is a portion of the electromagnetic spectrum which objects absorb to a greater or lesser degree. The amount of PIR that is reflected and thus recorded in images is an important feature of their spectral signature. Capturing this signature is especially useful when studying wet zones, bare soil and vegetation. From it, we can calculate spatial indices on water content or the photosynthesizing activity of biomass that experts are then able to interpret and use in decision-making.


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