Table 1
Major gaps and events affecting the astrometric solution.
| tbeg | tend | Length | Description |
|---|---|---|---|
| 1220.400 | 1225.200 | 4.800 | VPU reset |
| 1316.490 | 1389.113 | 72.623 | Decontamination #4 |
| 1443.800 | 1444.200 | 0.400 | Refocus (following FoV) |
| 1653.800 | 1660.000 | 6.200 | PAA anomaly |
| 1820.900 | 1830.000 | 9.100 | PAA anomaly |
| 2094.000 | 2099.000 | 5.000 | PDHU anomaly |
| 2179.125 | 2191.000 | 11.875 | VPU software update |
| 2192.252 | 2195.218 | 2.967 | Observation gap |
| 2238.000 | 2242.000 | 4.000 | Unknown |
| 2322.300 | 2401.559 | 79.259 | Decontamination #5 |
| 2405.967 | 2408.643 | 2.676 | Observation gap |
| 2408.935 | 2409.968 | 1.033 | Observation gap |
| 2574.640 | 2575.400 | 0.760 | Refocus (preceding FoV) |
| 2954.200 | 2958.000 | 3.800 | Moon eclipse |
| 3045.133 | 3049.000 | 3.867 | PDHU anomaly |
| 3603.250 | 3605.227 | 1.976 | Observation gap |
| 3646.800 | 3650.000 | 3.200 | Moon eclipse |
| 3663.700 | 3667.000 | 3.300 | Moon eclipse |
| 4074.210 | 4076.063 | 1.853 | Observation gap |
| 4112.463 | 4180.000 | 67.537 | Decontamination #6 |
| 4271.753 | 4275.200 | 3.445 | PAA anomaly |
| 4477.441 | 4481.000 | 3.550 | PAA anomaly |
| 4512.502 | 4515.000 | 2.498 | PAA anomaly |
| 4545.144 | 4548.000 | 2.856 | PAA anomaly |
| 5078.547 | 5080.600 | 2.053 | STR anomaly |
Notes. The table lists gaps longer than 1 revolution (0.25 day) and some other events of relevance for the calibration model. tbeg and tend are the start and end times of the gap in OBMT revolutions (see Eq. (1)). The third column is the length of the gap in revolutions. Abbreviations: VPU = video processing unit, FoV = field of view, PAA = phased array antenna, PDHU = payload data handling unit, STR = star tracker.
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