1) Review notes from last week. Some clarification questions asked about Olivier's presentation from Feb 14.
2) Observing plans for 2023. Jixia suggests observing for ~ 1 week at a time, daily observations of sky calibration sources, spread over a few months. (Not too long, or the nighttime observations won't overlap well.)
3) Analysis of NCP Oct 2017 data from TDA. These are constant dec observations at dec of Cas A. See Reza's attached slides. Day-to-day variations in time (~ 30 secs) of the peak transit, consistent with stability of dishes in RA (wind effects?). Data copied to IRODs from Tianlai 01 by Albert. This seems to be the only data set with repeated transits, so is the best data for studying calibration stability over time. (There's also data of repeated sun transits.)
4) Albert notes that DESI has made some observations at Decs that *might* be suitable for overlap. Most near Dec 0, which is not so good for us. DESI has advantage over BOSS of being deeper.