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29 May 2024 SWIR/NIR snapshot imaging spectrometers for monitoring water vapor dynamics
Tomasz Tkaczyk, Desheng Zheng, Christopher Flynn, Coby McNichols, Haimu Cao, Bruce C. Kindel, Ethan Gutmann, David Alexander
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Proceedings Volume 13083, SPIE Future Sensing Technologies 2024; 130830F (2024) https://doi.org/10.1117/12.3023435
Event: SPIE Future Sensing Technologies, 2024, Yokohama, Japan
Abstract
The monitoring of water vapor dynamics and evapotranspiration provides feedback for vegetation and crop water requirements. Many current evapotranspiration techniques heavily relay on satellite imagery, temperature distribution and incorporated into estimation models. The work presented here is based on a direct water vapor change monitoring using snapshot SWIR and NIR spectrometers utilizing custom fiber bundles. These bundles have dense input and sparse output creating void spaces for spectral information and allow recording of spatial-spectral data cube information in parallel at the CMOS/CCD cameras. SWIR / NIR snapshot spectrometers were packaged and ruggedized for field imaging. The number of spatial samples is adaptable within 8000 ~ 35,000 range and spectral sampling 20-50 values. SWIR system allowed 1050-1300 nm spectral range while NIR 650-1000nm, applying 1130nm and 940nm absorption windows respectively. We performed and present series of experiments including controlled reference measurements and field tests.
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Tomasz Tkaczyk, Desheng Zheng, Christopher Flynn, Coby McNichols, Haimu Cao, Bruce C. Kindel, Ethan Gutmann, and David Alexander "SWIR/NIR snapshot imaging spectrometers for monitoring water vapor dynamics", Proc. SPIE 13083, SPIE Future Sensing Technologies 2024, 130830F (29 May 2024); https://doi.org/10.1117/12.3023435
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KEYWORDS
Spectrometers
Crop monitoring
Near infrared
Short wave infrared radiation
Relays
Satellite imaging
Satellites
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