MODIS Aqua Surface Reflectance 8-Day L3 Global 250m 2021-09
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keyword: MODIS
keyword: Aqua
keyword: NASA
keyword: Satellite
keyword: Global
keyword: Imagery
keyword: Optical
keyword: Reflectance
keyword: Surface Reflectance
keyword: 250m
keyword: MYD09Q1
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description: The MODIS Aqua MYD09Q1 Version 6.1 product provides atmospherically corrected Surface Reflectance for MODIS Bands 1 and 2 at 250 m spatial resolution. The reflectance values are corrected for atmospheric effects including gases, aerosols, and Rayleigh scattering. The dataset is produced as an 8-day composite, where for each pixel the most suitable observation is selected from all acquisitions within the compositing period based on criteria such as cloud conditions and solar zenith angle. When multiple observations satisfy these criteria, the pixel with the lowest value in Band 3 (blue) is selected. The product also includes two quality assurance layers that provide information about data quality and observation conditions.
temporal: PeriodOfTime
  start date: 2021-09-01T00:00:00.000Z
  end date: 2021-09-30T23:59:59.999Z
license: other