This documentation is courtesy of Dave Frayer. AutoOOF(bright_source_name) 4mm_oct2014.pdf As a rough rule of thumb for the AutoOOF's, if the GFM solutions report RMS>350-400um, then I would consider ignoring the AutoOOF surface solutions and keeping the thermal's off (click yellow button to use the initial pointing and focus corrections, but then turn off the thermals and then point+focus). One can get questionable surface corrections in periods of significant winds (>~5m/s) and of course during a sunny day and it may be safer to use no thermal solutions than bad solutions. If it is windy and/or during the day, I would consider not running the AutoOOF's at all to save the time. AutoOOF-GFM RMS<300um typically in good night time conditions (can be even less than <200um).