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Improving AOD Algorithm Evaluation: A Spatial Matching Method for Minimizing Quality Control Bias
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DOI：10.3390/rs17071235.png)
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Abstract
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Satellite-derived aerosol optical depth (AOD) products from MODIS and VIIRS sensors are vital for monitoring global aerosol distributions. However, inconsistencies in quality control algorithms and spatial resolution introduce errors that complicate validation processes and reduce the accuracy of satellite-to-ground comparisons. This study proposes the optimal spatial matching method to minimize these errors and enable a more accurate evaluation of retrieval algorithm performance. Using AERONET ground observations from 2012 to 2021, MODIS and VIIRS AOD products were systematically validated with three spatial matching methods-direct, average, and optimal. Results demonstrate that the optimal method consistently outperformed the other methods by selecting pixel values. The study highlights significant quality control disparities across AOD products and demonstrates that high-resolution products, with purer pixels, achieve superior accuracy under the optimal method. These insights provide valuable guidance for optimizing dataset applications and refining aerosol retrieval algorithms.
Keywords:
aerosol optical depth
product validation
spatial matching method
quality control
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4.1
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7.7K
Citations:
15.1W
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