CLASSIC and CLIMB
The CLASSIC and CLIMB beam combiners of the CHARA Array are open air, aperture plane, wide bandwidth single spectral channel instruments optimized for sensitivity. CLASSIC is the original two beam combiner used for the first science at CHARA, and it still has the faintest magnitude limit. CLIMB is a three beam expansion of CLASSIC that can also provide closure phase measurements.
The CLASSIC / CLIMB data reduction software is maintained by Theo ten Brummelaar. Please see his website for Download and installation instructions.
The CLASSIC/CLIMB Beam Combiner at the CHARA Array - ten Brummelaar, T.A., et al. 2013, JAI, 2, 1340004 (pdf)