Concerning both the total ozone and Umkehr measurement at l'Observatoire 
de Haute Provence, France (station 40):  The site was struck by lighting 
in October 1999.  The instrument was not visually damaged and was 
operational but the associated systems were not working.  The site and 
equipment was not completely repaired until August 2000.  In September 
2002, the site was again damaged in a thunderstorm.  This time the 
instrument was rained on when winds blew the zenith hatch open.  The 
instrument was put back in operation, but the extent of damage was not 
fully known until July 2003.  At an intercomparison of Dobson instruments 
in Arosa, Switzerland, the instrument was opened and multiple problems 
related to the rain, and possibly as far back as the lightning strike, 
were found and repaired.  Data from October 1999 through July 2003 are 
thus suspect.  Note that in the intercomparison, the instrument total 
ozone measurements were very close to but "noisier" than those from the 
European standard on the average.

- R.D. Evans, NOAA-CMDL
  August 2003