Column - multiple species

C. Rinsland (LaRC) — Continuous record of infrared solar spectra from 1978 to 2005 using the FTS (0.005 cm 1 resolution) in the McMath Pierce Telescope. Operations resumed briefly in 2009.

T. Nagahama (STEL) and I. Morino (NIES) — Bruker 120M (0.004 cm 1 resolution) installed by STEL in May 1995. Tested at Toyokawa (35°N, 137°E) from December 1994 to April 1995. Bruker 120/5HR (0.0035 cm-1 resolution) installed by NIES in 2013. Total column data prior to 2000 is archived under previous PI (Kondo). Operations suspended from mid-2010 to 2013.

K. Strong (U. Toronto) — Bomem DA8 (0.004 cm-1 resolution) installed October 2001; routine measurements since May 2002.

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  However, no data have been archived and measurements ceased in September 2016.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).

J. Notholt  and M. Palm (U. Bremen) — Bruker 120HR operated from 2000-2003, Bruker 125HR since 2004. Data archived since 2002. Maximum resolution 0.0028 cm 1. Typically make one or two observations per week. Retrieval with SFIT2, SFIT4, and GFIT. The flat surroundings are conductive to satellite validation. The FTIR observations are complemented by DOAS measurements.

Johan Mellqvist (PI) and G. Persson (Chalmers U. Technology) — Bruker 125M (0.0035 cm 1 resolution) measurements conducted throughout the year. Intercompared with the NPL instrument in September/October 1994. Was upgraded from 120M to 125M in 2008-2009. Data available since late 1994; early data archived under previous PI (Galle). Current retrieval algorithms are SFIT4 and SFIT2.

J. Hannigan and I. Ortega and M. Coffey (ret) (NCAR) – Bruker 120M (250cm OPD) installed at South Mountain in 1999 in bldg. 1985, operating under autonomous control. Instrument was moved to bldg. 1971 (1km from previous location at same altitude) in Summer 2011. In May 2015 a new Bruker 125HR FTIR (also 250cm OPD) operating with new software control and new solar tracker was installed.

J. Notholt and M. Palm (U. Bremen) — Bruker 120M (0.004 cm-1 resolution), deployed 1992 to 1995. Replaced by Bruker 120HR (0.0028 cm 1 resolution) in 1995. Operates all year with lunar (polar night) observations added since December 1992. Upgraded to 125 HR in 2012.

H. Fast (ECCC) and K. Shibata and Y. Makino (MRI) — Bomem DA8 system (0.004 cm-1 resolution) deployed in February 1993 and removed in February 2009. Intercompared with NPL mobile instrument in spring 1999. Data archived for the winters of 1996–2000 and 2003–2006.