REMOTE METHOD FOR ALLOCATION OF FOREST AREAS WITH PREDOMINANCE OF DRY OR GREEN DECIDUOUS OR CONIFEROUS TREES IN SUMMER FROM AN AIRCRAFT CARRIER Russian patent published in 2021 - IPC A01G23/00 G01N21/25 

FIELD: forestry.

SUBSTANCE: invention relates to forestry and can be used for remote monitoring of forests in vast territories. The remote method for allocating forest areas with a predominance of dry or green deciduous or green coniferous trees in summer includes remote registration of the brightness fields of forest vegetation from an aircraft carrier. In contrast to the known methods for aerospace forest monitoring, laser sensing from an aircraft carrier is used at three wavelengths safe for vision, λ₁, λ₂, λ, selected according to experimental data in the UV and near-IR spectral ranges. According to the measurement data, two information indices and are formed and , equal to the ratio of the recorded intensities I(λ_i) and I(λ_j) at the wavelengths λ_i and λ_j. Areas with a predominance of dry or green deciduous or green coniferous trees are judged by the following ratios: R1(λ₂, λ₃) ≥R1_thr(λ₂, λ₃) for green deciduous and coniferous trees; R1(λ_2, λ₃)<R1_thr(λ₂, λ₃) for dry trees; R2(λ₂, λ₁) ≥R2_thr(λ₂, λ₁) for green deciduous trees; R2(λ₂,λ₁)<R2_thr(λ₂,λ₁) for green coniferous trees, where λ₁=355 nm, λ₂=2100 nm; λ₃=2030 nm; R1_thr(λ₂,λ₃), R2_thr(λ_2,λ₁) are threshold values selected in the preliminary studies of the spectra of the reflection of trees in the region.

EFFECT: method is based on the analysis of experimental measurements of the reflection spectra of dry, green deciduous and green coniferous trees in a wide spectral range of 350-2500 nm and makes it possible to monitor regardless of the time of day and in a wide range of atmospheric conditions at aircraft carrier flight altitudes up to 10 km.

1 cl, 5 dwg