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SIF Hyperspectral Measurement System
Sunlight-induced chlorophyll fluorescence (SIF) Hyperspectral measurement system
CHNSpec's latest FS-SIF series hyperspectral measurement systems for sunlight-induced chlorophyll fluorescence (SIF) detection include: line scanning hyperspectral camera (FS-SIF-1A), imaging hyperspectral camera (FS-SIF-2A) and hyperspectral drone system (FS-SIF-6A). This product is currently the world's leading hyperspectral SIF measurement equipment, using innovative patented optical paths and ultra-high sensitivity detectors with extremely high spectral resolution (0.3nm) and ultra-high signal ratio (600:1).
Features
·The line scanning hyperspectral camera (FS-SIF-1A) can be deployed for sunlight-induced chlorophyll fluorescence (SIF) detection of field crops. ·The imaging hyperspectral camera (FS-SIF-2A) can be deployed at the tower base or fixed point for observation. ·The hyperspectral UAV system (FS-SIF-6A) has the characteristics of flexible deployment and is not limited by the satellite transit time. It can quickly obtain SIF information of vegetation in the study area; compared with the fixed observation at the tower base, it obtains continuous time series SIF data, and the airborne platform can obtain SIF information of vegetation in more areas within a certain period of time.
Product Advantages
The sunlight-induced chlorophyll fluorescence (SIF) hyperspectral measurement system can measure the changes in chlorophyll fluorescence (SIF) induced by sunlight in plants by measuring the downward solar irradiance and upward reflected radiation during plant photosynthesis, which is used to estimate the carbon emissions of the two major biosphere carbon sources, Gross Primary Production (GPP) and ecosystem respiration (RECO). The airborne platform can be used as a supplement to the satellite-borne SIF and tower-based observation schemes. Compared with the satellite-borne platform, it has a flexible layout and is not limited by the satellite transit time. It can quickly obtain SIF information of vegetation in the study area; compared with the fixed observation of the tower base, it obtains continuous time series SIF data, and the airborne platform can obtain SIF information of vegetation in more regions within a certain period of time. The entire system is deeply developed based on DJI M400, with high integration and simple operation procedures.
Observation principle
Instrument optical system
Technical parameters

Model

Line Scan Hyperspectral Camera

(FS-SIF-1A)

Imaging Hyperspectral Camera

(FS-SIF-2A)

Hyperspectral UAV System

(FS-SIF-6A)

Spectral method

Transmission Grating

Spectral range

660-790nm

Spectral bands

1200

Spectral resolution (FWHM)

0.3nm

Slit width

15um

Transmission efficiency

60%

Stray light

0.5%

Spatial Pixels

1920

Pixel size5.86um

Imaging speed

128fps for full band, 3300fps after ROIFull band 128fps
Detector

CMOS

SNR(Peak)

600/1
Camera Output

USB3.0

Camera interface

C-Mount

Accessories

Lens, USB cable

Reflectivity Calibration Plate

ROI

Multiple regions

Weight

1.3kg

/

Lens focal length

25mm

Lens Field of View

25°, other viewing angles are optional

Calibration method

Reflectivity correction and area correction support batch processing

Data Format

Compatible with spe format, hdr format, scp format

Application Software

FIGSPEC UAV, FIGSPEC MS-PreMerge puzzle software, FIGSPEC Studio application software image analysis software


Measurement system applications
Hyperspectral imaging data and NDVI analysis results from field observations by the instrument

(a) Hyperspectral pseudo-color composite image observed by the instrument (b) Infrared reflectance image at the near-infrared 750 nm wavelength window (c) NDVI image (d) SIF image (e) Canopy reflectance spectrum and NDVI analysis results