[Keyword='Aerosol Index']
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TOMS/Earth Probe UV Aerosol Index Daily L3 Global 1x1.25 deg Lat/Lon Grid V008 (TOMSEPL3daer) at GES DISC
Entry ID:
GES_DISC_TOMSEPL3daer_V008
Summary
Abstract:
This data product contains TOMS/Earth Probe UV Aerosol Index Daily L3 Global 1x1.25 deg Lat/Lon Grid Version 8 data in ASCII format.
The Total Ozone Mapping Spectrometer (TOMS) Version 8 daily global gridded data consist of total column ozone, aerosol index, Lambertian effective surface reflectivity (Rayleigh corrected) and surface UV-B erythemal irradiances. Four TOMS ... 
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Geographic Coverage
(Click for Interactive Map)
Spatial coordinates
Data Set Citation
Dataset Originator/Creator:
TOMS Science Team
Dataset Title:
TOMS/Earth Probe UV Aerosol Index Daily L3 Global 1x1.25 deg Lat/Lon Grid
Dataset Series Name:
TOMS Data
Dataset Release Place:
Greenbelt, MD
Dataset Publisher:
NASA Goddard Space Flight Center
Version:
008
Online Resource:
http://disc.gsfc.nasa.gov/
Temporal Coverage
Start Date:
1996-07-22
Stop Date:
2005-12-31
Location Keywords
Data Resolution
Latitude Resolution:
1.0 Degrees
Longitude Resolution: 1.25 Degrees Horizontal Resolution Range: 100 km - < 250 km or approximately 1 degree - < 2.5 degrees Temporal Resolution: Daily Science Keywords
ISO Topic Category
Platform
Project
Quality
WARNING: EP TOMS started experiencing calibration problem since 2002. 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, data are showing 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
Use Constraints
EP TOMS started experiencing calibration problem since 2002. Because of the continuing changes in the optical properties of the front scan mirror that are not well understood, data started showing 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.
Earth Probe TOMS data since 2002 should NOT be used for trend analysis because of the calibration problem. Ancillary Keywords
Data Set Progress
COMPLETE
Originating Center
Data Center
Distribution
Distribution Media:
ftp
Distribution Size:
0.2 Mbytes
Distribution Format:
HDF
Fees:
none
Personnel
Role:
INVESTIGATOR
Phone:
301-614-5731
Fax:
301-614-5903
Email:
Pawan.K.Bhartia at nasa.gov
Contact Address:
NASA
Goddard Space Flight Center
Mailstop 613.3
City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
Creation and Review Dates
DIF Creation Date:
2005-06-16
Last DIF Revision Date:
2009-08-03
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