Unmodified 1 deg GRIB TOVS OZONE (source NOAA/CPC). 1st May 1996 - 2003. (1997 mising data).

1996
1998
1999
2000
2001
Change in NOAA platform required a 3% increase in data to maintain comparisons.
Unmodified and modified are shown below.

2002
2002 Modified
2002
2002 Modified