{"id":162,"date":"2014-11-12T23:46:30","date_gmt":"2014-11-12T23:46:30","guid":{"rendered":"http:\/\/www.eaobservatory.org\/jcmt\/?page_id=162"},"modified":"2025-11-26T17:30:22","modified_gmt":"2025-11-27T03:30:22","slug":"heterodyne","status":"publish","type":"page","link":"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/","title":{"rendered":"Heterodyne Receivers"},"content":{"rendered":"<p>The <a href=\"http:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/acsis\/\">ACSIS spectrometer<\/a> is used with all the heterodyne instruments. The receivers are further described here:<\/p>\n<ul>\n<li><a title=\"350 GHz band array receiver \u2013 HARP\" href=\"http:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/harp\/\">350 GHz array receiver HARP,<\/a><\/li>\n<li>Three-receiver heterodyne instrument, <a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/\">N\u0101makanui<\/a>, is currently being commissioned. N\u0101makanui was built by a team at <a href=\"http:\/\/www.asiaa.sinica.edu.tw\/\">ASIAA<\/a> (Taiwan) and is on loan to the JCMT as a spare for the <a href=\"https:\/\/www.cfa.harvard.edu\/greenland12m\/instrument\/\">GLT<\/a>. For further information about each cartridge:\n<ul>\n<li><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/alaihi\/\">\u02bbAla\u02bbihi (86 GHz),<\/a><\/li>\n<li><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/uu-230ghz\/\">`\u016a`\u016b (230 GHz),<\/a><\/li>\n<li><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/aweoweo-345ghz\/\">`\u0100weoweo (345 GHz),<\/a><\/li>\n<li><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/kuntur\/\">Kuntur (690 GHz).<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Spectral Line Frequencies<\/h4>\n<ul>\n<li><a href=\"http:\/\/spec.jpl.nasa.gov\/\/ftp\/pub\/catalog\/catform.html\">JPL spectral line catalog browser form<\/a>; and <a href=\"http:\/\/spec.jpl.nasa.gov\/home.html\">explanation of use<\/a><\/li>\n<li><a href=\"http:\/\/physics.nist.gov\/PhysRefData\/Micro\/Html\/contents.html\"> List of observed microwave lines<\/a> (Lovas 2009 revision); see also <a href=\"http:\/\/physics.nist.gov\/PhysRefData\/contents.html\">NIST fundamental data listings<\/a><\/li>\n<li>The <a href=\"http:\/\/www.ph1.uni-koeln.de\/vorhersagen\/\">Cologne Database for Molecular Spectroscopy<\/a><\/li>\n<li><a href=\"http:\/\/splatalogue.net\/\">Splatalogue<\/a><\/li>\n<\/ul>\n<h4>Velocities<\/h4>\n<p><a href=\"http:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/velocity-considerations\/\">Velocity frames and definitions<\/a> used at the JCMT.<\/p>\n<h4>Retired receivers<\/h4>\n<p>In the science archive one can find data obtained with a number of <a href=\"http:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/retired-receivers\/\">retired receivers<\/a> such as:<\/p>\n<ul>\n<li><a href=\"http:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/rxa\/\">230 GHz receiver RxA<\/a> (retired on June 27th, 2018)<\/li>\n<li><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/rxw\/\">660 GHz band: RxW<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>The ACSIS spectrometer is used with all the heterodyne instruments. The receivers are further described here: 350 GHz array receiver HARP, Three-receiver heterodyne instrument, N\u0101makanui, is currently being commissioned. N\u0101makanui was built by a team at ASIAA (Taiwan) and is on loan to the JCMT as a spare for the\u2026 <a class=\"continue-reading-link\" href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/\">Continue reading<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"parent":134,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/162"}],"collection":[{"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/comments?post=162"}],"version-history":[{"count":52,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/162\/revisions"}],"predecessor-version":[{"id":13444,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/162\/revisions\/13444"}],"up":[{"embeddable":true,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/134"}],"wp:attachment":[{"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/media?parent=162"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}