The experiment was a preliminary examination of the considerations needed to intercompare ultraviolet spectrometers (UVS). The participants were University of North Carolina (UNC), University of Florida (UF), National Oceanic and Atmospheric Administration (NOAA), Environmental Protection Agency (EPA), Smithsonian Radiation Laboratory (SRL), Atmospheric Environment Service (AES) and National Institute for Standards and Technology (NIST). The experiment was held at the NOAA/EPA's environmental measurement facility in Research Triangle Park, NC. The experiment took place November 5-7, 1990. The pilot intercomparison and was an opportunity to compare available instrumentation, broadband and spectral, for use in monitoring programs. Ultimately the pilot experiment should provide future guidelines for a more complete international intercomparison of instruments, standards and calibrations.