Bryan Johnson whom I introduced earlier and who set up the meeting and Joel Michalski and Andy Clarke. Joel and Andy will winter over at the South Pole and they will be there during my stay. They are going to be the technical support staff for NOAA and need to know all instruments, how they work, and how they can be repaired. The Dobson Spectrophotometer is located in a dome on the roof of the NOAA building. The measurements done with the Dobson are one of the ways to measure total ozone.
Total ozone means the total amount of ozone above a certain point linear to the sun.
It will be used once the sun is at a certain angle above the horizon, at the beginning of October. It will be used when we will be at the South Pole in January. G.M.B.Dobson used a spectrophotometer and discovered by 1930 that total ozone values depend on the location, season, weather, and time of the day. The design of the instrument has not changed since 1947 except for the electronics. The measurements are done with different wavelength between 305nm to 340nm.