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I am using google earth engine just to print the timestamp here of TRMM Data. I am using the geometry of a part of Chennai which is in India.

// Filtering Data with Date and Geometry
var Data1 = TRMM.filterBounds(geometry).filterDate('2013-04-09', '2014-04-10');

// Printing Timestamp
print('TRMM Metadata', Data1.first().date());
Map.centerObject(geometry, 8);
Map.addLayer(geometry,{color: 'FF0000'},"Chennai");

My question what exactly the printed time does indicate (with respect to UTC (GMT) or Local Time Zone (IST) ).

just in case if you need the import

IMPORTS:

var TRMM = ee.ImageCollection("TRMM/3B42"),
geometry = /* color: #d63000 */ee.Geometry.Polygon(
    [[[80.26491619216495, 13.08801893465061],
      [80.26422954665713, 13.077652181027775],
      [80.28002239333682, 13.08166516962143]]]);

I am using google earth engine only to print the timestamp here of TRMM Data and not anyway related to my question.

1

According to the current TRMM documentation:

The time zone for this data set is Universal Coordinated Time (UTC, also known as GMT or Z).

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