PUPPI

PUPPI (Puerto Rican Ultimate Pulsar Processing Instrument) was a back end instrument instrument for the Arecibo Telescope, working in conjunction with one of the telescope's receivers, to observe pulsar timing over a wide (800 MHz) band. It was a project of National Radio Astronomy Observatory (NRAO) and was a clone of GUPPI. The Arecibo Telescope is no longer operational, as of late 2020. I'm not sure if PUPPI was used as recently as 2020: it may be that new equipment and/or software had replaced it.