EQMOD PECPrep

PECPrep is a free, open source application for the analysis of your mount's Periodic Error (PE) and autoguiding performance.

It can import data from different capture sources. PECPrep is able to filter wind, seeing effects, linear and non linear drift to isolate the periodic signal associated with a mounts worm drive. It can also be used to generate a Periodic Error Correction (PEC) file for use by EQASCOM.