"**What is Harmony?** [Harmony](https://harmony.earthdata.nasa.gov/) is a service that allows you to customize many NASA datasets, including the ability to subset, reproject and reformat files. Data can be subsetted for a geographic region, a temporal range and by variable. Data can be \"reprojected\" from its native coordinate reference system (CRS) to the coordinate reference system relevant to your analysis. And data can be reformatted from its native file format to a format that is more relevant for your application. These services are collectively called _transformation services_. However, not all services are available for all datasets. You will learn how to discover which services are available for a given dataset.\n",
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