Unresolved Issues As of This Writing

We are still learning about Mini-Mosaic, and hammering out a few software issues. Here they are.

• Cross-talk. There is some minor cross-talk between the chips; this should calibrate out as easily as it does with the NOAO MosaicI and MosaicII cameras. We are currently working on determining the cross-talk coefficients. Stay tuned!

• Filter offsets. The offset values in for the filters in Wheel1 do not work. This limits the usefulness of doobs when run with instrpars.setfocus=auto, as the focus cannot be adjusted automatically when changing filters. We suggest that you leave instrpars.setrfocus="yes".

• Temperature coefficients. We don't know good values for the temperature coefficients of the focus, and haven't checked that the software takes these into account with instrpars.setfocus=auto. We suggest that you leave instrpars.setfocus="yes" and refocus as needed. We do expect that for every 1 degree C colder it gets that the focus probably needs to be increased by 40 microns or so. Since a 10 micron change is obvious in good seeing, refocus often!

• Count rates. The ``B" count rate seems rather low. The ``U" count rate is extroplated.

• Safe exposure speed. We do not recommend extremely short shutter speeds, and recommend you keep your standard star exposures reasonably long (5 secs?) unless you determine the shutter correction for yourself.