T. Nagahama (STEL) – Bruker 120HR (0.0028 cm 1 resolution) operating at the Observatory since April 1996. The instrument experienced sun tracker failures from April 2007 to June 2009 and again in late 2010. Not currently operational. NDACC measurements were scheduled to resume in mid-2015 with a Bruker 125HR. However, no data have been archived and measurements ceased in September 2016. The instrument was scheduled to be moved to ISEE in Nagoya. Total column data from 1996 to 2000 archived under former PI Kondo , and vertical distribution data from 1996 to 2007 archived by Y. Nagahama (NIES).