Documentation for the scripts included with TUI. Run_Commands : run a sequence of commands (the simplest kind of scripting). ... Drift : take a time series of spectra by moving the object along the slit during each exposure. Focus : determine the best focus. ... Focus GMech : determine the best gmech focus. Focus Sec : determine the best secondary mirror focus. ... Data Cube : take a sequence of exposures over a range of wavelengths. ...