What are properties of tile geometry of Sentinel data?

Question

I have downloaded sample tile from

http://sentinel-s2-l1c.s3-website.eu-central-1.amazonaws.com/#tiles/10/S/DG/2015/12/7/0/

and found tileInfo.json file with the following information

"tileGeometry" : {
    "type" : "Polygon",
    "crs" : {
      "type" : "name",
      "properties" : {
        "name" : "urn:ogc:def:crs:EPSG:8.8.1:32610"
      }
    },
    "coordinates" : [ [ [ 399960.0, 4200000.0 ], [ 509760.0, 4200000.0 ], [ 509760.0, 4090200.0 ], [ 399960.0, 4090200.0 ], [ 399960.0, 4200000.0 ] ] ]
  },

It appears, that tile is strictly rectangular in some coordinates, because corners contain duplicate values. Is this property constraint, i.e. true for all tiles?

What units are used for these coordinates? I tried to interpret them as lat-lon multiplied by some factor, but probably failed (was unable to identify any ground details with compre to google maps).

Also I can interpret it as meters, because they have 6 digits and meters should have 5.

UPDATE

I have plotted coordinates

Both height and width are 109800 of units, so it can't be meters, which would sum up to 100000. But it coincides with the number of pixels in tile.

Answer 1

If you check this page, you will notice: For Level-1C and Level-2A, the granules, also called tiles, are 100x100 km2 ortho-images in UTM/WGS84 projection.

I guess the easiest way to get insight in tiles is to download a tile KML and open it in Google Earth or similar.

Answer 2

I found an answer here: https://en.wikipedia.org/wiki/Universal_Transverse_Mercator_coordinate_system#Locating_a_position_using_UTM_coordinates

Is says, that each UTM zone has it's origin at intersection of central meridian of the zone and equator. The units are meters indeed. But the values are shifted by some big numbers to avoid negative values.