Fluids Integrated Rack (FIR)/Light Microscopy Module (LMM):  The crew replaced the confocal camera which stopped responding on June 22.  The confocal system allows observation of very narrow depths-of-field in 3 dimensional samples, essentially allowing many different layers of the sample to be observed and later reconstructed as a 3 dimensional image.  Recovery of this system …

Source: ISS Daily Summary Report - 7/03/2019