Surface feature hyperspectral high-frequency observation system based on unmanned aerial vehicle

Abstract

According to a surface feature hyperspectral high-frequency observation system based on an unmanned aerial vehicle, surface feature hyperspectral and hyperspectral information is obtained from different heights and different scales, and meanwhile, solar incident spectrums and surface feature reflection spectrums are alternately obtained through a forked optical fiber and an optical path change-over switch; acquisition of observed solar spectrums and surface feature spectrums is guaranteed to be carried out under the same light intensity condition, errors of calculated surface feature reflectivity caused by changes of light intensity are avoided, and high-quality surface feature hyperspectral and hyperspectral reflectivity data products can be automatically and flexibly obtained; a measured spectrum curve can be checked in real time from the ground, a user can judge the quality of observed data by himself / herself, and high quality of spectrum data is ensured; multiple groups of spectrum curves are obtained through one round of observation of an observation program, and the system error of an instrument is further reduced through average value processing; the observation program ensures that the two sets of observation subsystems concurrently execute observation work in the same time interval, and the synchronism of the observation work of the two sets of observation subsystems is improved.

Description

technical field [0001] The invention relates to an unmanned aerial vehicle-based ground object hyperspectral high-frequency observation system, which belongs to the technical field of spectrometer observation. Background technique [0002] Various ground features in nature have their own spectral characteristics and their own electromagnetic radiation laws, such as reflection and absorption of certain bands of ultraviolet, visible light, infrared and microwave. Among the physical properties such as reflection, absorption and transmission of ground objects, the most commonly used one is the reflection characteristics of ground objects. It is an important way to qualitatively and quantitatively study the characteristics of ground objects to obtain the reflection spectrum information of ground objects by means of remote sensing. [0003] The existing remote sensing methods mainly include aerospace remote sensing, ground remote sensing, and near-ground remote sensing. Among th...

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Problems solved by technology

[0006] At present, the UAV-mounted spectral sensor equipment available on the market is limited, and usually can only receive one optical path. To obtain the incident light of the sun and the reflected light of ground objects at the same time, it is necessary to convert one optical path into two; in addition, the operating environment of the spectrometer requires high requirements. , in order to reduce noise interference, the spectrometer needs to be placed in a constant temperature box

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