Announcing Sims tech note, SMTN-005:
This is a writeup of looking at data from the all-sky camera data collected at the LSST site. The main results:
- The camera is not sensitive enough to detect enough stars at high enough SNR to construct full transparency maps (maps of the extinction magnitude over the visible sky).
- Difference imaging consecutive exposures does look like a potential way forward for constructing cloud masks (e.g., which pixels probably have clouds, and which are probably clear).
- The difference images should also provide a useful way of predicting where clouds will move to in future exposures.
- The majority of time is either very clear or very cloudy. It looks like only 5-10% of the time could be improved by using dynamic cloud avoidance.
Tech notes are living documents, so feel free to make comments or request edits (or clone the repo and fix things on your own…).