A Dual-Channel Aerosol Optical Depth Retrieval Algorithm Incorporating the BRDF Effect from AVHRR over Eastern Asia
نویسندگان
چکیده
A NOAA/AVHRR dual-channel method over land is proposed to simultaneously retrieve aerosol optical depth (AOD) at 0.55 μm, and surface reflectance 0.63 0.85 μm. Compared with previous well-established one-channel retrieval algorithms, this algorithm takes advantage of the ratio between μm in an attempt account for effect induced by bidirectional distribution function (BRDF). This cannot be negligible due orbit drift phasing running NOAA satellites, both which potentially cause large solar angular variation. Meanwhile, observation posture change AVHRR would sensor variation time series measurements. The used based on dual channels found more reasonable assumed as unchanged during a certain period time, compared traditional when addressing BRDF issue. AOD retrievals have been carried out Eastern Asia. Validation against robotic network (AERONET) measurements shows that up 83% validation collocations are within error lines (±0.15 ± 0.15τ, τ AOD) R 0.88 root mean square (RMSE) 0.15. taking into proved outperforming conventional μm-channel method. It indicates our has potential applied long AOD, especially sensors lack shortwave infrared channel required MODerate resolution Imaging Spectroradiometer (MODIS) dark target algorithm.
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ژورنال
عنوان ژورنال: Remote Sensing
سال: 2021
ISSN: ['2315-4632', '2315-4675']
DOI: https://doi.org/10.3390/rs13030365