A Deep Learning Trained Clear-Sky Mask Algorithm for VIIRS Radiometric Bias Assessment

Details

• Journal Title:
  Remote Sensing
• Personal Author:
  Liang, Xingming ; Liu, Quanhua ; Yan, Banghua ; Sun, Ninghai
• NOAA Program & Office:
  NESDIS (National Environmental Satellite, Data, and Information Service) ; STAR (Center for Satellite Applications and Research)
• Description:
  Clear-sky mask (CSM) is a crucial influence on the calculating accuracy of the sensor radiometric biases for spectral bands of visible, infrared, and microwave regions. In this study, a fully connected deep neural network (FCDN) was proposed to generate CSM for the Visible Infrared Imaging Radiometer Suite (VIIRS) onboard Suomi National Polar-Orbiting Partnership (S-NPP) and NOAA-20 satellites. The model, well-trained by S-NPP data, was used to generate both S-NPP and NOAA-20 CSMs for the independent data, and the results were validated against the biases between the sensor observations and Community Radiative Transfer Model (CRTM) calculations (O-M). The preliminary result shows that the FCDN-CSM model works well for identifying clear-sky pixels. Both O-M mean biases and standard deviations were comparable with the Advance Clear-Sky Processor over Ocean (ACSPO) and were significantly better than a prototype cloud mask (PCM) and the case without a clear-sky check. In addition, by replacing CRTM brightness temperatures (BTs) with the atmosphere air temperature and water vapor contents as input features, the FCDN-CSM exhibits its potential to generate fast and accurate VIIRS CSM onboard follow-up Joint Polar Satellite System (JPSS) satellites for sensor calibration and validation before the physics-based CSM is available.
• Keywords:
  Neural networks (Computer science) Bias Assessment Clear-sky Mask Fully Connected Deep Neural Network (FCDN) VIIRS
• Source:
  Remote Sens. 2020, 12(1), 78
• DOI:
  https://doi.org/10.3390/rs12010078
• Document Type:
  Journal Article
• Rights Information:
  CC BY
• Compliance:
  Submitted
• Main Document Checksum:
  urn:sha256:9abdcd779e4f8f1c17eae1639bb7a30372ce911bd6c0026cbf81f7364821519c
• Download URL:
  https://repository.library.noaa.gov/view/noaa/45254/noaa_45254_DS1.pdf
• File Type:
  [PDF - 2.22 MB ]