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TimeTool results can be computed by the DAQ while data is being recorded and written directly into the .xtc files, or after data has been recorded. In AMO/XPP the time tool analysis is done by the DAQ while data is being recorded. Results can be accessed using the following epics-variables names: TTSPEC:AMPL (amplitude of biggest edge found by the filter), TTSPEC:AMPLNXT (amplitude of second-biggest edge found by the filter), TTSPEC:FLTPOS (the position of the edge, in pixels), TTSPEC:FLTPOSFWHM (the FWHM of the edge, in pixels), TTSPEC:FLTPOS_PS (the position of the edge, in picoseconds, but requires correct calibration constants be put in the DAQ when data is acquired), TTSPEC:REFAMPL (amplitude of the background "reference" which is subtracted before running the filter algorithm) or by getting the appropriate Psana.TimeTool.DataV* object from the event (either V1 or V2) from the opal camera source.

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