Recommendation:

We recommend that swath dataset files always include a time coordinate even when there is only one value.

Recommendation Details: A time coordinate is required for a swath file when it contains data from many time instances. Sometimes swath files with data from a single time instance could be without a time coordinate because each file records that specific time value in either the file name or file-level attributes, or both. A time coordinate should be defined and used in all data variables that vary in time, regardless of the number of time instances. This will allow downstream users to more easily and efficiently aggregate data across separate files.