8/2016:  New dataset is released.  
This data adjusts N16, N17 and N19 to N18.  Early data is minimally adjusted.  
Nimbus-7 and N11 are not adjusted.  N09 is adjusted to N11.

NOAA -19 used in this version is NASA Version 8.6:  n19s4g.

This dataset used in LOTUS report:
SPARC/IO3C/GAW, 2019: SPARC/IO3C/GAW report on Long-term Ozone Trends and 
Uncertainties in the Stratosphere. I. Petropavlovskikh, S. Godin-Beekmann, 
D. Hubert, R. Damadeo, B. Hassler, V. Sofieva (Eds.), SPARC Report No. 9, 
WCRP-17/2018, GAW Report No. 241, doi:10.17874/f899e57a20b, available at 
www.sparc-climate.org/publications/sparc-reports (J.D. Wild co-author 
chpt. 2&3, contributing-author chpt. 4&5).