To allow ingest of phosim-simulated data while using lsstCam mapper we suggest to add  controller = 'H'.  This is to guarantee unique obsid values for phosim data (Tim Jennes's comment).  If this is done, currently the translator returns (using  obs_lsst version w.2020.48-1-gf0a7a3e )

translate_header.py -p lsst.obs.lsst.translators MC_H_20000217_000032_R00_SW0.fits 

Analyzing MC_H_20000217_000032_R00_SW0.fits...

ValueError("Supplied controller, 'H' is neither 'O' nor 'C'")

An update is needed to allow for controller = 'H' . It affects the  `exposure_id` method in https://github.com/lsst/obs_lsst/blob/master/python/lsst/obs/lsst/translators/lsst.py  

It doesn't clash with other definitions https://confluence.lsstcorp.org/display/SYSENG/Image+naming+and+visit+definition+conventions (K-T Lim's comment).