Abstract:
This data product contains TOMS/Meteor-3 Ground Station Overpass Data Version 8 in ASCII format. The overpass data files contain the data derived from the best-matched TOMS field-of-view (FOV) to a site for every day the TOMS instrument was operational.
Four TOMS instruments were 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). The TOMS Earth Probe, Meteor-3 and Nimbus-7 data were reprocessed using the Version-8 algorithm by the Laboratory for Atmospheres at NASA Goddard Space Flight Center (Code 614).
Each overpass file contains four (4) header records, followed by all the data records.
HEADER RECORDS -------------- The file header consists of four (4) records:
1. Site name, ID, and location. 2. Overpass program run information 3. Column headings 4. Marker record.
In this example, the site ID number is 21, the latitude is 53.30N and longitude is 113.58W, and the verified elevation is 723 m (above sea level).
The FORTRAN format code for reading the first header record is:
(A30, 4X, I3, 7X, F7.2, 7X, F7.2, 7X, I4)
An example of the second header record is:
Meteor-3 TOMS V.8 Overpass - Generated: 050328
This indicates the spacecraft instrument, the data version used to generate the overpass data, and the date on which the file was generated (created or updated).
The third header record contains the column headings for the data records. The header looks like this:
MJD Year Day sec-UT SCN LAT LON DIS PT SZA OZONE REF A.I. SOI
The contents of each column is described below in the section on Data Records.
The fourth header record simply contains a pound-sign (#) in the first column, and signals that the data begin with the next record in the file.
DATA RECORDS ------------
Each data record contains fourteen (14) values. They are as follows.
MJD Modified Julian Day. Astronomical Julian Day number, less 2,400,000.5. The number is given to the nearest 1/10 day.
Year The four-digit Gregorian year number of the TOMS measurement.
Day The day number (day 1 through 366) of the TOMS measurement.
sec-UT The number of seconds from midnight, Universal Time. on the day specified by Year and Day.
SCN TOMS instrument scan position (1--35 for N7, M3, EP; 1--37 for Adeos)
LAT Latitude of the center of the IFOV.
LON Longitude of the same.
DIS Distance from site and IFOV center position, in km.
PT Terrain pressure at IFOV center, in (atm x 100)
SZA Solar zenith angle, in degrees, at time and location of IFOV
OZONE TOMS best total ozone, in Dobson Units (DU)
REF TOMS reflectivity at 380 nm (N7, M3) or 360 nm (EP, Adeos).
A.I. TOMS aerosol index.
SOI TOMS sulfur dioxide index.
The FORTRAN format code for reading a data record is:
(F7.1, 1X, I4, 1X, I3, 1X, I5, 2X, I2, 1X, F6.2, 1X, F7.2, 1X, I3, 1X, I3, 1X, F5.2, 1X, F5.1, 1X, F5.1, 1X, F6.2, 1X, I4)
Purpose:
This product can be used to compare TOMS with ground station data.
Related URL
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VIEW PROJECT HOME PAGE
Description:
Information and access to TOMS data from the TOMS home page.
Geographic Coverage
N: 90.0
S: -90.0
E: 180.0
W: -180.0
Data Set Citation
Dataset Originator/Creator:
TOMS Science Team
Dataset Title:
TOMS/Meteor-3 Ground Station Overpass Data
Dataset Release Date:
2005
Dataset Release Place:
Greenbelt, MD, USA
Dataset Publisher:
NASA Goddard Earth Science Data and Information Services Center
Version:
008
Data Presentation Form:
Digital Science Data
Online Resource:
http://disc.gsfc.nasa.gov/
Since TOMS on Meteor-3 was launched in a 212 day precessing polar orbit, the local equator crossing changes with time. Consequently no data were retrieved when the instrument was viewing near the morning or evening terminator. The table below lists the periods when high quality data are available:
Name:
GES DISC HELP DESK SUPPORT GROUP Phone:
301-614-5224
Fax:
301-614-5268
Email:
gsfc-help-disc at lists.nasa.gov
Contact Address:
Goddard Earth Sciences Data and Information Services Center
Code 610.2
NASA Goddard Space Flight Center City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
PAWAN
K
BHARTIA, PH. D 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
OMAR
O.
TORRES, PH. D 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
JAY
R.
HERMAN, PH. D 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
RICHARD
D
MCPETERS, PH. D 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
SURAIYA
P.
AHMAD, PH. D 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
JAMES
EDWARD
JOHNSON 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., "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.
Creation and Review Dates
DIF Creation Date:
2011-02-23
Last DIF Revision Date:
2012-12-13
