NASA EARTHDATA GLOSSARY
Many of the terms used by NASA Earth Observing System Data and Information System (EOSDIS) are defined in their Earth Observation Data Basics Glossary.
We also give some simple definitions for commonly used terms in this documentation below.
Collection: a set of data products or files for the same release of that product, data generated during an experiment or campaign.
concept-id: a unique identifier for a collection, granule, service or tool. Concept-id can be used to search for datasets or granules using earthaccess.
Granule: the smallest aggregation of data. It could be an individual scene or swath acquired at a given timestep. You can think of granules as files.