UTMOST was the results of a substantial 2017 upgrade to MOST,
the Molonglo Observatory Synthesis Telescope,
a radio telescope located in Hoskinstown, Australia (near Canberra).
It was retired in June 2023.
The upgraded telescope's target was radio transients including
pulsar observations and fast radio bursts (FRBs).
MOST was a c1980 rebuilding of the 1960s Molonglo Cross Telescope.
The Molonglo Cross was cross-shaped (with north-south and east-west
arms), and MOST reconfigured that into twin 778-meter east-west
cylindrical telescopes, 15 meters' separated. The UTMOST upgrade
gave it a modern back end. A further upgrade carried out in
2020-2021 was termed UTMOST-2D, which restored its north-south
arms, i.e., restored its cross shape.