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  1. I am trying to locate OMI/Aura NO2 column satellite data. I have located the
    following webpage:
     
    https://aura.gesdisc.eosdis.nasa.gov/data/Aura_OMI_Level2/OMNO2.003/
     
    However, when I click on a year, there appears to be no indication of the
    geographic region of the various files. For instance, I am seeking NO2 data for
    a region of China (tile: h27v05) for two specific date ranges in 2016 and 2017.
    Can you please help me find this data?
     
    Thank you,
    Shahir
  2. From Mary Greene, NASA GES DISC:

    The OMI Level-2 data are provided in swaths and are time-ordered in coverage of the Earth.  
    The data are geo-referenced in latitude and longitude, but not archived explicitly by geo-reference.
     
    The dataset landing page for this product
    https://disc.sci.gsfc.nasa.gov/uui/datasets/OMNO2_V003/summary?keywords=OMNO2_003&start=1920-01-01&end=2017-05-19
    lists sub-setting service options for data access.
     
    You can use the Subset Wizard https://disc.sci.gsfc.nasa.gov/SSW/#keywords=OMNO2 or EarthData search
    https://search.earthdata.nasa.gov/search/granules?p=C1239966842-GES_DISC&tl=1479393264!4!!&q=omno2&ok=omno2.