Quality engineer, John Tota, poses with a magnifying glass and stands close to the textured wall in the Electro Magnetic Interference (EMI) chamber. Mr. Tota works to ensure the overall quality of the flight hardware builds on the Ocean Color Instrument (OCI). 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.