Copilot

*copilot.py* is a script that watches for new images, measures them,

and produces a plot, *recent.png* to help observers understand what the conditions are doing.

Start it from the mzls@mayall-idl.kpno.noao.edu account,

python copilot.py &

It will monitor the $MOS3_DATA directory, and whenever a new image comes it, it will measure it, update a little database, and create a "strip plot" showing the conditions.

The database is in *~/obsbot/obsdb/obsdb.sqlite3*.

An example plot is shown here:

The top panel shows the seeing. Any problems with the data we know how to detect are marked with red vertical bands. These include:

• readtime -- MAY indicate a duplicated image ("md5sum" is a better indicator).
• md5sum -- this image contains identical pixels as a previous image. This requires action! Please see the problem description https://desi.lbl.gov/trac/wiki/PublicPages/MayallZbandLegacy/NotesforObservers/Problems#a5.Repeatimages HERE.
• pixcnt -- the image readout is shifted. Please have a look at this exposure and note in the logs which CCD has the shift. The shifts are pretty easily recognized in the *mscexam* IRAF window -- blocks of one of the images will be shifted to the left or right. Do not stop observing. This problem is described https://desi.lbl.gov/trac/wiki/PublicPages/MayallZbandLegacy/NotesforObservers/Problems#a4.Shiftedimages here
• (unlabelled bar) -- it has been a while since the last image has been seen. Have images stopped being written? See problem description https://desi.lbl.gov/trac/wiki/PublicPages/MayallZbandLegacy/NotesforObservers/Problems#a0.Noimagesbeingwritten here