Table 2.
Calibration parameters used in DDECal at different stages of the analysis.
| Parameter | Bandpass calibration | A-team subtraction | 3C subtraction | NCP subtraction |
|---|---|---|---|---|
| Input data level | L1 | L2 | L2 | L3 |
| Output data level | L2 | L2 | L3 | L4 |
| Mode | Diagonal | Diagonal | Diagonal | Diagonal |
| Time interval | 4 s | 2 min | 4 min | 8 min |
| Frequency interval | 15.3 kHz | 195.3 kHz | 195.3 kHz | 195.3 kHz |
| Directions | Cas A | Four A-team sources and NCP | Seven 3C sources and NCP | 7 Clusters |
| Smoothness constraint | None | 2 MHz | 2 MHz | 6 MHz |
| uv range | > 15λ | > 20λ | > 40λ | > 40λ |
Notes. L1 data have a 15.26 kHz frequency resolution while L2, L3 and L4 data have 61.03 kHz frequency resolution. The time resolution for L1, L2, L3 and L4 data levels is 4 s.
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