Removing temperature drift and temporal variation in thermal infrared images of a UAV uncooled thermal infrared imager

Wang, Ziwei; Zhou, Ji; Ma, Jin; Wang, Yong; Liu, Shaomin; Ding, Lirong; Tang, Wenbin; Pakezhamu, Nuradili; Meng, Lingxuan

doi:10.1016/j.isprsjprs.2023.08.011

Cited by 9 publications

(1 citation statement)

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“…Considering the study's practical needs, we selected time periods with lower wind speeds for experimentation and carefully deliberated on flight speed to strike a balance between image quality and the necessary coverage range, aiming to mitigate wind and temperature drift effects. Despite these considerations, temperature drift persisted [29]. Future endeavors may explore suitable temperature-correction algorithms to further refine image quality.…”

Section: The Influence Of Flight Altitude On Retrieval Resultsmentioning

confidence: 99%

Retrieval of Plateau Lake Water Surface Temperature from UAV Thermal Infrared Data

Sima,

Tang,

et al. 2024

Atmosphere

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The lake water surface temperature (LWST) is a critical parameter influencing lake ecosystem dynamics and addressing challenges posed by climate change. Traditional point measurement techniques exhibit limitations in providing comprehensive LWST data. However, the emergence of satellite remote sensing and unmanned aerial vehicle (UAV) Thermal Infrared (TIR) technology has opened new possibilities. This study presents an approach for retrieving plateau lake LWST (p-LWST) from UAV TIR data. The UAV TIR dataset, obtained from the DJI Zenmuse H20T sensor, was stitched together to form an image of brightness temperature (BT). Atmospheric parameters for atmospheric correction were acquired by combining the UAV dataset with the ERA5 reanalysis data and MODTRAN5.2. Lake Water Surface Emissivity (LWSE) spectral curves were derived using 102 hand-portable FT-IR spectrometer (102F) measurements, along with the sensor’s spectral response function, to obtain the corresponding LWSE. Using estimated atmospheric parameters, LWSE, and UAV BT, the un-calibrated LWST was calculated through the TIR radiative transfer model. To validate the LWST retrieval accuracy, the FLIR Infrared Thermal Imager T610 and the Fluke 51-II contact thermometer were utilized to estimate on-point LWST. This on-point data was employed for cross-calibration and verification. In the study area, the p-LWST method retrieved LWST ranging from 288 K to 295 K over Erhai Lake in the plateau region, with a final retrieval accuracy of 0.89 K. Results demonstrate that the proposed p-LWST method is effective for LWST retrieval, offering technical and theoretical support for monitoring climate change in plateau lakes.

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Section: The Influence Of Flight Altitude On Retrieval Resultsmentioning

confidence: 99%