| Date | Change Type | Time Delta (hours) | Reason |
| Jul 26, 2017 | OBSERVER_REQUESTED | +38.3 | Request to spread time between three programs (1193, 1194, 1995). |
| Feb 02, 2018 | OBSERVER_REQUESTED | -1.5 | as per January 30, 2018 email from Marie Ygouf |
| May 19, 2020 | OBSERVER_REQUESTED | +6.3 | Updated from Marcia Rieke email. |
| Dec 19, 2020 | OVERHEAD_CHANGE | +0.4 | APT 2020.5 |
| Jul 01, 2021 | OVERHEAD_CHANGE | +0.9 | APT 2021.2 |
| Sep 25, 2021 | OVERHEAD_CHANGE | +0.1 | PRDOPSSOC-040 |
| Apr 05, 2022 | OBSERVER_REQUESTED | +0.6 | TTRB 88459 approved |
| Aug 04, 2022 | OVERHEAD_CHANGE | +0.1 | APT 2022.3.3 |
| Oct 10, 2022 | STSCI_RECOMMENDATION | +1.8 | Recommended background observations match science observations |
| Oct 10, 2022 | STSCI_RECOMMENDATION | +0.2 | Added to support background observations that match science observations |
| Oct 12, 2022 | STSCI_RECOMMENDATION | +1.0 | Schedulers requested the removal of certain links, which resulted in overhead increases. |
| Nov 18, 2022 | OVERHEAD_CHANGE | +1.6 | APT 2022.7.1 |
| May 19, 2023 | OVERHEAD_CHANGE | +0.3 | APT 2023.3.1 |
| May 30, 2023 | OBSERVER_REQUESTED | +3.7 | TTRB 88781 Request |
| Aug 04, 2023 | OVERHEAD_CHANGE | +2.8 | Changes to overheads with new PRDOPSSOC-062 |
| Aug 27, 2023 | OVERHEAD_CHANGE | +0.1 | APT 2023.5.1 |
| Dec 03, 2023 | OVERHEAD_CHANGE | +0.1 | APT 2023.7.1 |
