1. Alan Gabriel Boudine Days Orsay, October, 2005 1 Boudine Days, Orsay, October 2005 SUNLAB the mission that almost was Alan Gabriel Institut d’Astrophysique Spatiale, Orsay

2. Alan Gabriel Boudine Days Orsay, October, 2005 2 SUNLAB was born out of the solar payload flown on the Instrument Pointing System (IPS) on Spacelab 2 in April 1985 The IPS carried four solar instuments, HERTZ (Brueckner) SOUP (Title) SUSIM (Brueckner) CHASE (Gabriel, Culhane)

3. Alan Gabriel Boudine Days Orsay, October, 2005 3 Key events April 1985 successful flight of Spacelab 2 Autumn 1985 – NASA decides to refly solar instruments on later Spacelab :- named “SUNLAB” SUNLAB included 3 of the instruments of Spacelab 2 – plus the TRC of LPSP January 1986 – Challenger accident perturbs Shuttle program October 1986 – NASA puts SUNLAB on “hold” November 1987 – NASA cancels SUNLAB

4. Alan Gabriel Boudine Days Orsay, October, 2005 4 SUNLAB was being planned jointly between: RAL (Bruce Patchett for CHASE) and LPSP (Boudine for TRC) Bruce with some of the CHASE team Bruce was heard to say:- “I have to accept the cancellation of SUNLAB, but I am really sad to lose the chance to work with Boudine” (Bruce Patchett died prematurely on 12 September 1996)