TOVSA5TN_01

TOVS GLA 5 DAY GRIDS from TIROSN V01 (TOVSA5TN ) at GES DISC

Version 01 eng
  • Abstract
    This dataset (TOVSA5ND) contains the TIROS Operational Vertical Sounder (TOVS) level 3 geophysical parameters derived using data from NOAA-12 and the physical retrieval method of Susskind et al. (1984) and processed by the Satellite Data Utilization Office of the Goddard Laboratory for Atmospheres at NASA/GSFC. This method, which is hydrodynamic model- and a priori data-dependent, is designated as the so-called Path A scheme by the TOVS Pathfinder Science Working Group. The 20 channel High resolution Infrared Radiation Sounder 2 (HIRS2) and the 4 channel Microwave Sounding Unit (MSU) aboard the NOAA-xx series of Polar Orbiting Satellites are used to produce global fields of the 3-dimensional temperature-moisture structure of the atmosphere. In addition to profiles of temperature and moisture, the HIRS2/MSU data are used to derive important quantities such as land and sea surface temperature, outgoing longwave radiation, cloud fraction, cloudtop height, total ozone overburden and precipitation estimates. The Path A system steps through an interactive forecast-retrieval-analysis cycle. In each 6 hour synoptic period, a 2nd order General Circulation Model (Takacs et al., 1994) is used to generate the 6 hour forecast fields of temperature and humidity. These global fields are used as the first guess for all soundings occuring within a 6 hour time window centered upon the forecast time. These retrievals are then assimilated with all available insitu measurements (such as radiosonde and ship reports) in the 6 hour interval using an Optimal Interpolation (OI) analysis scheme developed by the Data Assimilation Office of the Goddard Laboratory for Atmospheres. This analysis is then used to specify the initial conditions for the next 6 hour forecast, thus completing the cycle. The retrieval algorithm itself is a physical method based on the iterative relaxation technique originally proposed by Chahine (1968). The basic approach consists of modifying the temperature profile from the previous iteration by an amount proportional to the difference between the observed brightness temperatures and the brightness temperatures computed from the trial parameters using the full radiative transfer equation applied at the observed satellite zenith angle. For the case of the temperature profile, the updated layer mean temperatures are given as a linear combination of multichannel brightness temperature differences with the coefficients given by the channel weighting functions. Constraints are imposed upon the solution in order to ensure stability and convergence of the iterative process. For more details see Susskind et al (1984). There are 6 level 3 data product files, each of which is in the HDF format and each representative of a different averaging time period. All files contain the same number of geophysical parameter arrays stored as HDF Scientific Data Sets (SDSs). The time periods include daily, 5 day (pentad) and monthly, with the AM and PM portions of the orbits treated separately. All data are mapped to a 1 degree longitude by 1 degree latitude global grid.
  • Version Description
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Data Identification Fields:

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    Data Dates
    Creation
    Last Revision
    Processing Level

    3

    Quality
    Collection Progress

    Complete

    Publication References
    • Publication reference title not provided
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Related URLs
    Science Keywords
    • EARTH SCIENCE
    • ATMOSPHERE
    • ATMOSPHERIC CHEMISTRY
    • OXYGEN COMPOUNDS
    • OZONE
    • EARTH SCIENCE
    • ATMOSPHERE
    • ATMOSPHERIC PRESSURE
    • ATMOSPHERIC PRESSURE MEASUREMENTS
    • EARTH SCIENCE
    • ATMOSPHERE
    • ATMOSPHERIC RADIATION
    • OUTGOING LONGWAVE RADIATION
    • EARTH SCIENCE
    • ATMOSPHERE
    • ATMOSPHERIC TEMPERATURE
    • SURFACE TEMPERATURE
    • AIR TEMPERATURE
    • EARTH SCIENCE
    • ATMOSPHERE
    • ATMOSPHERIC WATER VAPOR
    • HUMIDITY
    • EARTH SCIENCE
    • ATMOSPHERE
    • ATMOSPHERIC WATER VAPOR
    • WATER VAPOR
    • HUMIDITY
    • EARTH SCIENCE
    • ATMOSPHERE
    • CLOUDS
    • CLOUD PROPERTIES
    • CLOUD FREQUENCY
    • EARTH SCIENCE
    • ATMOSPHERE
    • CLOUDS
    • CLOUD PROPERTIES
    • CLOUD HEIGHT
    • EARTH SCIENCE
    • ATMOSPHERE
    • PRECIPITATION
    • PRECIPITATION AMOUNT
    • EARTH SCIENCE
    • LAND SURFACE
    • SURFACE THERMAL PROPERTIES
    • LAND SURFACE TEMPERATURE
    • EARTH SCIENCE
    • OCEANS
    • OCEAN PRESSURE
    • SEA LEVEL PRESSURE
    • EARTH SCIENCE
    • OCEANS
    • OCEAN TEMPERATURE
    • SEA SURFACE TEMPERATURE
    • EARTH SCIENCE
    • OCEANS
    • SEA SURFACE TOPOGRAPHY
    • SEA SURFACE HEIGHT
    • EARTH SCIENCE
    • SPECTRAL/ENGINEERING
    • INFRARED WAVELENGTHS
    • INFRARED IMAGERY
    • EARTH SCIENCE
    • SPECTRAL/ENGINEERING
    • MICROWAVE
    • BRIGHTNESS TEMPERATURE
    • EARTH SCIENCE
    • SPECTRAL/ENGINEERING
    • MICROWAVE
    • MICROWAVE IMAGERY
Other Descriptive Keywords
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Ancillary Keywords
  • 5-DAY
  • CLIMATE CHANGE
  • CLOUD FRACTION
  • EOSDIS
  • GRID DATA
  • GROUND TEMPERATURE
  • HYDROLOGIC CYCLE
  • RADIATION
  • RADIATION BUDGET
  • SEA LEVEL PRESSURE
  • SEA SURFACE TEMPERATURE
  • SST
  • SURFACE PRESSURE
  • UPPER AIR
  • UPWARD RADIATION
ISO Topic Categories
  • CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
  • ELEVATION
  • GEOSCIENTIFIC INFORMATION
  • IMAGERY/BASE MAPS/EARTH COVER
  • OCEANS
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Acquisition Information Fields:

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Platforms
  • Earth Observation Satellites
    TIROS-N
    Instruments
    • HIRS/2
    • MSU
    • TOVS
Projects
Project Short Name Campaigns Project Dates
EOSDIS No campaigns listed. No dates provided.
ESIP No campaigns listed. No dates provided.
TOVS PATHFINDER No campaigns listed. No dates provided.
CWIC No campaigns listed. No dates provided.

Temporal Information Fields:

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Spatial Information Fields:

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Location Keywords
    • VERTICAL LOCATION
    • BOUNDARY LAYER
    • GEOGRAPHIC REGION
    • GLOBAL
    • VERTICAL LOCATION
    • SEA SURFACE
    • VERTICAL LOCATION
    • STRATOSPHERE
    • VERTICAL LOCATION
    • TROPOSPHERE

Data Centers

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  • NASA/GSFC/SED/ESD/GCDC/GESDISC
    ARCHIVER
    Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

    This data center does not have any addresses listed.

    This data center does not have any contact mechanisms listed.

Data Contacts

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  • JOEL
    Technical Contact
    JOEL SUSSKIND

    Goddard Space Flight Center
    Mailstop 613.0
    Greenbelt, MD 20771

    • Email
    • 301-286-7210
    • 301-286-2323
  • THOMAS
    Metadata Author
    THOMAS HEARTY

    Distributed Active Archive Center Global Change Data Center
    Code 610.2
    NASA Goddard Space Flight Center
    Greenbelt, MD 20771

  • Data Center Contact
    GES DISC HELP DESK SUPPORT GROUP

    NASA/GSFC/SED/ESD/GCDC/GESDISC

    Goddard Earth Sciences Data and Information Services Center
    Code 610.2
    NASA Goddard Space Flight Center
    Greenbelt, MD 20771

    • Email
    • 301-614-5224
    • 301-614-5268

Collection Citations Fields:

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