The purpose of the project was to conduct premier atmospheric measurements and instrument calibrations at Mauna Loa Observatory (MLO) in Hilo, Hawaii. In the process of performing calibrations of the WMO Dobson standard spectrophotometer, the research will directly contribute to the continuation of the World Standard Ozone Observations (WSOO) carried by the NOAA Global Monitoring Division. This will help maintain high quality measurements in the entire WMO Global Atmospheric Watch Program of ozone observations. Langley method data shall be collected daily as weather permits and transmitted to Boulder Global Monitoring  Division (GMD) within 24 hours of collection.