G. C. Toon (JPL) – Operation of a home-built interferometer (JPL MkIV with 0.006 cm 1 resolution).  Archived database exists from SOLVE/THESEO campaign (winter 1999/2000), the SOLVE2 campaign from January to April 2003, and also January – February 2007.  Balloon-borne data for this instrument also exist from flights above Esrange.