GEC/TOMS/X1 - Calibration Error

For data beginning in year 2000, the calibration has been stabilized relative to NOAA-16 
SBUV/2 in the equatorial zone. Because of continuing changes in the optical properties of 
the front scan mirror that are not well understood, we are now seeing a latitude 
dependent error that cannot be corrected by a simple calibration correction. The calibration 
appears to be stable near the equator. But by 50 degrees latitude, there is now a -2% to -4% 
error in TOMS, a bit larger in the northern hemisphere than in the southern hemisphere. 
Because of this error, data since 2002 should NOT be used for trend analysis.

Data should not be used for trend analysis.

• (Raw data stream - documentation not supported)

• (Raw data stream - documentation not supported)

• (Raw data stream - documentation not supported)

• Date(date)
• aerosol index(ai)
• lon(lon)
• base time in epoch(base_time)
• Time offset from base_time(time_offset)
• Ozone concentration(ozone)
• North Latitude(lat)
• reflectivity(reflectivity)