J. Mellqvist, J. Klyft, and G. Persson (Chalmers U. Technology) – Bruker 120M (0.0035 cm 1 resolution) measurements conducted throughout the year, but mainly during winter at the Solar Observatory. Intercompared with the NPL instrument in September/October 1994. Upgraded to 125M in 2008-2009. Data available since late 1994; early data archived under previous PI (Galle). Current retrieval algorithm is SFIT2 v.3.93.
M. Van Roozendael (IASB-BIRA) – Two DOAS systems (one for NO2 and ozone, the other for BrO and OClO) operated during winter campaigns from January 1994 until March 1997, and continuously since January 1998.
IASB-BIRA: Institut d'Aéronomie Spatiale de Belgique
NPL: National Physical Laboratory