NSSDCA ID: ESAC-00018
Availability: Data Accessible Elsewhere
Time span: 1978-11-01 to 1992-01-31
The individual ozone data (OVERPASS) from the Nimbus-7 Total Ozone Mapping Spectrometer (TOMS) is the third data set on the third TOMS CD-ROM volume. This data set contains individual TOMS measurements most nearly coincident with specific geographic locations. The data includes ozone measurements in Dobson units for 333 sites. The OVERPASS data set covers the time period from November 1, 1978 through January 31, 1992. The list of sites was compiled to accomodate varied interests including Dobson sites, M83 sites, a selection of large cities, launch sites, and other general or scientific interest sites. The criteria for selecting the TOMS data point closest to a site are: (1) The TOMS field-of-view (FOV) must be within 1 degree of latitude and 1 degree of longitude of the ground site; (2) the overpass selection is weighted to select near-nadir passes; and (3) flagged ozone data are used only if non-flagged data are not available. All of the data are in ASCII format. Each data record includes the date, scan position, time, latitude and longitude of the TOMS measurement, total ozone in Dobson units (milli-atm-cm), reflectivity (%), solar zenith angle, and a data quality flag. Software and documentation is included on the CD-ROM. The software on the CD-ROM was written specifically for an IBM PC (or compatible) computer.
This data set along with the gridded TOMS data on CD-ROM and tape (see 78-098A-09Z,a-c,and R), have been transferred to the Goddard Distributed Active Archive in March 1994.
Questions and comments about this data collection can be directed to: Coordinated Request and User Support Office
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Richard D. McPeters | Data Provider | NASA Goddard Space Flight Center | mcpeters@wrabbit.gsfc.nasa.gov |
Mr. David E. Larko | General Contact | Hughes STX Corporation | larko@jwocky.gsfc.nasa.gov |