Mechanical technician, Thomas Huber and mechanical engineer Peter Steigner, install an electronic box onto the Ocean Color Instrument (OCI) deck. Once the remaining boxes are installed, electrical connections will be made and testing will be performed. OCI is a highly advanced optical spectrometer that will be used to measure properties of light over portions of the electromagnetic spectrum. It will enable continuous measurement of light at finer wavelength resolution than previous NASA satellite sensors, extending key system ocean color data records for climate studies. OCI is PACE's (Plankton, Aerosol, Cloud, ocean Ecosystem) primary sensor built at Goddard Space Flight Center in Greenbelt, MD.