TIEGCM file list start and end dates and times
s001.nc  Date: 2023-04-01  Time: 00:20:00    Date: 2023-04-01  Time: 08:00:00
s002.nc  Date: 2023-04-01  Time: 08:20:00    Date: 2023-04-01  Time: 16:00:00
s003.nc  Date: 2023-04-01  Time: 16:20:00    Date: 2023-04-02  Time: 00:00:00
s004.nc  Date: 2023-04-02  Time: 00:20:00    Date: 2023-04-02  Time: 08:00:00