FOREST (FOur beam REceiver System on 45m-Telescope) is a 100GHz-band,
4-beam, dual-polarization (2-pol.), sideband-separating (2SB) SIS
(Superconductor-Insulator-Superconductor) heterodyne receiver being
developed for the Nobeyama 45-m Telescope. This receiver will be the
most powerful tool at 100GHz-band by adding new capabilities to the NRO
45-m Telescope: (1) large-area mapping at high angular resolution and
(2) simultaneous multi-line (mapping) observation. Other capabilities
that other 100GHz-band receivers possess (e.g., deep pointing
observation, spectral line survey) will also be covered by FOREST.
Please see here for details.