This script builds Good Time Intervals from housekeeping data, information about satellite stability, and data gaps. The resulted GTIs are written to the IBIS-GNRL-GTI, see details in Table 44. Index of all IBIS-GNRL-GTI Data Structures for all categories is written to the IBIS-GNRL-GTI-IDX.
| Column Name | Description |
| OBT_START | On-board time of start of the GTI |
| OBT_END | On-board time of end of the GTI |