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I extracted sentinel 2 images from Google Earth Engine using the Python API with something like this:

# Sentinel 2 Image Collection
s2_image_collection = ee.ImageCollection("COPERNICUS/S2_SR")

filteredCollection = s2_image_collection.filter(ee.Filter.lt("CLOUDY_PIXEL_PERCENTAGE", 5))

When I loop over the images in filteredCollection, I get the following ids:

COPERNICUS/S2_SR/20191002T162111_20191002T162929_T16TGM
COPERNICUS/S2_SR/20191002T162111_20191002T162929_T17TKG
COPERNICUS/S2_SR/20191005T163131_20191005T163713_T16TGM
COPERNICUS/S2_SR/20191005T163131_20191005T163713_T17TKG
...

I was surprised to see two images for each date. What does "T16TGM" vs "T17TKG" mean?

1 Answer 1

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Accrding to Sentinel 2 product naming convention, the part you are interested in corresponds to the image Tile number according to the US-MGRS naming convention.

Note that Sentinel-2 products are a compilation of elementary granules of fixed size, along with a single orbit.

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