Self-calibration usage modes for initial capability:
- Phase-only, continuum-only
- Amplitude attempts as future development possibility
- Single pointing observations (no mosaics)
- Aggregate continuum self-calibration (gaincal combine=spw, applycal spwmap)
- Per-spw self-calibration (mapping from wide to narrow windows)
- Need to understand conditions where per-spw will perform better
- Long and short baseline observations
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