TOVS
STATUS
1978-current
AVAILABILITY
Data from the TOVS Pathfinder processing is available in two formats depending upon the needs of the user. The Pathfinder level 3 master files are stored as HDF files in the DAAC's nearline jukebox. These contain detailed information about the output including gridding statistics and auxiliary quality and satellite parameter information. They are designed for the intermediate to expert user of the data. The other format used is a simple binary format containing no headers or trailers, designed for interdisciplinary and non-expert users of the data. They are available for 5-day periods on anonymous ftp, and for monthly periods as part of the DAAC Interdisciplinary Data Collection on anonymous ftp. No gridding statistics are included with these files.
REQUEST PROCEDURE
Subset of Path A Gridded Data ftp://daac.gsfc.nasa.gov/data/tovs/pentad_avg/ Subset of Path B Gridded Data ftp://daac.gsfc.nasa.gov/data/tovs/pentad_avg_tovsb/ Path A Interdisciplinary Data ftp://daac.gsfc.nasa.gov/data/inter_disc/tovs_atmo_sound/ Path B Interdisciplinary Data ftp://daac.gsfc.nasa.gov/data/inter_disc/tovsb_atmo_sound/ contact Goddard DAAC http://disc.gsfc.nasa.gov/atmosphere/dynamics/data/tovs_readme.shtml
Satellite Instruments
The TOVS instrument package provides information on temperature and humidity profiles, total ozone, clouds and radiation on a global scale. The Pathfinder processing of this dataset using a fixed algorithm provides a wealth of climatological information. TOVS has been carried aboard NOAA polar orbiting weather satellites since 1978, and continues to the present. the TOVS system, which includes three separate sensors: HIRS/2, MSU, and SSU. A fourth sensor, a Solar Backscattered ultraviolet system (SBUV/2) for ozone measurement, was added to the instrument complement starting with the NOAA-9 spacecraft
CONTACT
Steve Kempler
NASA GSFC DAAC Manager
Goddard Earth Sciences Data and Information Services Center NASA Goddard Space Flight Center Code 610.2 Greenbelt, MD 20771 USA
301-614-5224
Steven.J.Kempler@nasa.gov
http://disc.sci.gsfc.nasa.gov/additional/faq/precipitation_faq.shtml
SECONDARY CONTACT
Mary Greene
NASA GSFC DAAC
Goddard Earth Sciences Data and Information Center NASA Goddard Space Flight Center Code 610.2 Greenbelt, MD 20771 USA
301-614-5224
mary.c.greene@nasa.gov
http://disc.sci.gsfc.nasa.gov/additional/faq/precipitation_faq.shtml
SPECIFICATIONS
Measurment TypeVisible/IR-imager
Platform TypeTOVS
OrbitSun synchronous
Spectral CoverageSBUV/2 UV radiation at twelve(12) variable wavelengths, HIRS/2 (4.3 um and 15um), SSU (3 channels around 15 microns) , and MSU spectral frequencies: 50.3, 53.74, 54.96, and 57.95 GHz with a channel bandwidth of 200 MHz in each case
Active/PassivePassive
Scan PatternPush broom
Variablesatmospheric water vapor and temperature profiles total column ozone volcanice ash
Altitude
Inclination
Repeat Time
Wavelength to nm
Number of Bands
Temporal Coverage
Swath Width
Resolution 120-km equivalent diameter at nadir (Terra and Aqua); 10-km equiv. diam. (TRMM)cm
REFERENCES
http://disc.gsfc.nasa.gov/atmosphere/dynamics/data/tovs.shtml http://disc.gsfc.nasa.gov/atmosphere/dynamics/data/tovs_readme.shtml http://www2.ncdc.noaa.gov/docs/podug/html/c4/sec4-0.htm
REMARKS
Up to 4 different instruments used to generate the TOVS dataset. Variables: shortwave, longwave and window channel radiative fluxes at top-of-atmosphere; derived surface and within-atmosphere radiative fluxes; derived cloud properties from MODIS (Terra & Aqua) or VIRS (TRMM) that are consistent with CERES radiative fluxes
UPDATED ON
12 Nov 2009 10:19