Initially operating at 240 GHz using a focal-plane bolometer array, the telescope was upgraded in 2018 with a heterodyne receiver system operating at 345 GHz and 460 GHz.[3]
^Kohno, K. "The Atacama Submillimeter Telescope Experiment". The Cool Universe: Observing Cosmic Dawn, ASP Conference Series, Vol. 344, Proceedings of the conference held 4–8 October 2004 in Valparaiso, Chile. Bibcode:2005ASPC..344..242K.
^Okuda, Takeshi; Iono, Daisuke; Satou, Naohisa; Uemizu, Kazunori; Inata, Motoko; Izumi, Natsuko; Kamazaki, Takeshi; Ito, Tetsuya; Asayama, Shin'Ichiro; Fujii, Yasunori (2018). "The new heterodyne receiver system for the ASTE radio telescope: Three-cartridge cryostat with two cartridge-type superconducting receivers". In Gao, Jian-Rong; Zmuidzinas, Jonas (eds.). Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX. p. 100. doi:10.1117/12.2313087. ISBN9781510619692. S2CID116823513.