Packed Ultra-wideband Mapping Array (PUMA) is a proposed radio telescope operating at 200MHz-1100MHz, optimized for the 21 cm intensity mapping in the post-reionization era but also addressing other science goals amenable to such observations, primarily Fast Radio Bursts (FRBs), pulsar monitoring and transients as a part of multi-messenger observations.
This idea grew up from deliberations of the Cosmic Visions Dark Energy Committee, a panel tasked with investigating possible future directions for Dark Energy program within the Office of Science of the US Department of Energy. A working group has been established that led to the development of a Stage II 21cm experiment that eventually morphed into PUMA.