IRI file list start and end dates and times
IRI.2D.2015090.nc  Date: 2015-03-31  Time: 00:00:00    Date: 2015-03-31  Time: 23:45:00
IRI.2D.2015091.nc  Date: 2015-04-01  Time: 00:00:00    Date: 2015-04-01  Time: 23:45:00
IRI.3D.2015090.nc  Date: 2015-03-31  Time: 00:00:00    Date: 2015-03-31  Time: 23:45:00
IRI.3D.2015091.nc  Date: 2015-04-01  Time: 00:00:00    Date: 2015-04-01  Time: 23:45:00