Reference HOPS Calibration Pipeline for the Event Horizon Telescope

The Event Horizon Telescope (EHT) is a global network of millimetre and sub-millimetre wave radio tele-scopes that has produced the first resolved images of the supermassive black holes M87 and Sgr A* using Very Long Baseline Interferometry (VLBI). The EHT-HOPS calibration pipeline extends the capabilities of the Haystack Observatory Postprocessing System (HOPS) with routines specific to the reduction of EHT observations (L. Blackburn et al., 2019, ApJ, 882, 23). We present a new version of the EHT-HOPS pipeline which has been refactored with a goal to calibrate multiple years of EHT data and observations from similar VLBI arrays, providing reference calibrated data products under a common automated framework.