TOMS/Earth Probe UV Reflectivity Monthly L3 Global 1x1.25 deg Lat/Lon Grid V008 (TOMSEPL3mref) at GES DISC
Entry ID:
GES_DISC_TOMSEPL3mref_V008
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Summary
Abstract:
This data product contains TOMS/Earth Probe UV Reflectivity Monthly L3 Global 1x1.25 deg Lat/Lon Grid Version 8 data in ASCII format. The Total Ozone Mapping Spectrometer (TOMS) Version 8 monthly global gridded data consist of total column ozone, aerosol index, Lambertian effective surface reflectivity (Rayleigh corrected) and surface UV-B erythemal irradiances. Four ... TOMS instruments have been successfully flown on the following satellites: Nimbus-7 (Nov. 1978 - May 1993), Meteor-3 (Aug. 1991 - Dec. 1994), Earth Probe (July 1996 - current), and ADEOS (Sep. 1996 - June 1997).
Earth Probe, Meteor-3 and Nimbus-7 data are currently reprocessed using the Version-8 algorithm (http://toms.gsfc.nasa.gov/version8/v8toms_atbd.pdf) . These Version-8 data are archived at the Goddard Distributed Active Archive Center (DAAC).
The total ozone, aerosol index, reflectivity data and UV-B Erythemal irradiances are mapped to a global grid of size 180 x 288 with a Lat/Lon resolution of 1.00 x 1.25 degrees. These data are also stored in the EOS version of Hierarchical Data Format (HDF-EOS). HDF was developed by the National Center for Supercomputer Applications (NCSA) at the University of Illinois at Urbana-Champaign.
The GES DISC DAAC maintains an online Web-based system (Giovanni) for previewing the data, subsetting in ASCII format and downloading the data and images. The URL for Giovanni is http://giovanni.gsfc.nasa.gov/
The Level-2 data at instrument resolution(approx 50km x 50km pixel at nadir, in HDF5 EOS format) are also available from the GES DISC. For more information regarding TOMS or other DAAC data sets please visit the DAAC Home Page at http://disc.sci.gsfc.nasa.gov/acdisc/ , or contact the DAAC Help Desk at:
GSFC DAAC Help Desk
NASA Goddard Space Flight Center
Code 610.2
Greenbelt, MD 20771
gsfc-help-disc@lists.nasa.gov
TOMS data are produced by the Laboratory for Atmospheres at NASA Goddard Space Flight Center (Code 613). The Version-8 Algorithm Theoretical Basis Document (ATBD) is available from the TOMS site http://toms.gsfc.nasa.gov/version8/v8toms_atbd.pdf
For detailed information about the TOMS instrument, data, and ozone see the TOMS official Home Page at: http://toms.gsfc.nasa.gov/ 
Related URL
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Description:
OPeNDAP Access Earth Probe TOMS data from the GES DISC.
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Geographic Coverage
(Click for Interactive Map)
Spatial coordinates
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N: 90.0
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S: -90.0
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E: 180.0
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W: -180.0
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Data Set Citation
Dataset Originator/Creator:
TOMS Science Team
Dataset Title:
TOMS/Earth Probe UV Reflectivity Monthly 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
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:
Monthly
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.
Data Set Progress
COMPLETE
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
Role:
INVESTIGATOR
Phone:
301-614-6776
Email:
omar.o.torres at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Code 614
City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
Role:
INVESTIGATOR
Email:
Jay.R.Herman at nasa.gov
Contact Address:
NASA
Goddard Space Flight Center
Mailstop 614.0
City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
Role:
INVESTIGATOR
Phone:
301-614-6038
Fax:
301-614-5903
Email:
richard.d.mcpeters at nasa.gov
Contact Address:
NASA
Goddard Space Flight Center
Mailstop 613.3
City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
Role:
TECHNICAL CONTACT
Phone:
301-614-5284
Email:
Suraiya.Ahmad at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Code 610.2
City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
Role:
DIF AUTHOR
Phone:
301-614-5121
Email:
James.Johnson at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Code 610.2
City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
Publications/References
Eck, T. F., Bhartia, P. K., Kerr, J. B., Satellite estimation of spectral UVB irradiance using TOMS derived total ozone and UV reflectivity, Geophy. Res. Letters 1995, 22, 611-614 Herman, J.R., et al., "Meteor-3 Total Ozone Mapping Spectrometer (TOMS) Data Products User's Guide." NASA reference publication 1393, 1996. McPeters, R.D., et al., "Earth-Probe Total Ozone ... Mapping Spectrometer (TOMS) Data Products User's Guide." NASA Reference Publication 206895, April 1998. ftp://toms.gsfc.nasa.gov/pub/eptoms/EARTHPROBE_USERGUIDE.PDF
McPeters, R.D., et al., "Nimbus-7 Total Ozone Mapping Spectrometer (TOMS) Data Products User's Guide." NASA Reference Publication 1384, April 1996.
Krueger, A., M. Schoeberl, P.Newman, and R.Stolarski, June 1992. "The 1991 Antarctic Ozone Hole; TOMS Observations", Geophys. Res. Letters, 19: 1215-1218.
Schoeberl, M.R., A.J. Krueger, and P.A. Newman, 1986. 'The Morphology of Antarctic Total Ozone As Seen by TOMS,' Geophys. Res. Letters, 13:1217-1220.
Extended Metadata Properties
(Click to view more)
Creation and Review Dates
DIF Creation Date:
2011-01-31
Last DIF Revision Date:
2011-12-19
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