TOVSA5NG_01
TOVS GLA 5 DAY GRIDS from NOAA-10 V01 (TOVSA5NG) at GES DISC
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Abstract
This dataset (TOVSA5NG) contains the TIROS Operational Vertical Sounder (TOVS) level 3 geophysical parameters derived using data from NOAA-10 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:
Data Dates
Creation | |
Last Revision |
Processing Level
3
Quality
Collection Progress
Complete
Related URLs
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- 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
- WATER VAPOR INDICATORS
- 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
Science Keywords
Other Descriptive Keywords
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
Additional Attributes
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DIF9.0-to-DIF10-Converter
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Acquisition Information Fields:
Platforms
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Earth Observation Satellites
NOAA-12Instruments
- TOVS
- MSU
- HIRS/2
Projects
Project Short Name | Campaigns | Project Dates |
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TOVS Pathfinder | No campaigns listed. | No dates provided. |
CWIC | No campaigns listed. | No dates provided. |
Temporal Information Fields:
Spatial Information Fields:
Location Keywords
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- 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
ARCHIVERGoddard 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 ContactJOEL SUSSKIND
Goddard Space Flight Center
Mailstop 613.0
Greenbelt, MD 20771- 301-286-7210
- 301-286-2323
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THOMAS
Metadata AuthorTHOMAS HEARTY
Distributed Active Archive Center Global Change Data Center
Code 610.2
NASA Goddard Space Flight Center
Greenbelt, MD 20771- 301-614-6513
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GES DISC HELP DESK SUPPORT GROUP
Data Center ContactGES 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- 301-614-5224
- 301-614-5268
Collection Citations Fields:
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TOVS GLA 5 DAY GRIDS from NOAA-10
01Created by: Goddard Laboratory for Atmospheres at NASA/GSFC
Published by: Goddard Earth Sciences Data and Information Services Center (GES DISC)
Released: 1995-01-01