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US-Total Electron Content Product (USTEC)

Metadata from the NOAA Metadata Manager's Repository (NMMR)


Identification_Information:
Citation:
Citation_Information:
Originator:DOC/NOAA/NWS/SWPC > Space Weather Prediction Center, National Weather Service, NOAA, U.S. Department of Commerce
Publication_Date:20060401
Title:
US-Total Electron Content Product (USTEC)
Online_Linkage:http://www.swpc.noaa.gov/ustec/
Online_Linkage:http://www.ngdc.noaa.gov/stp/IONO/USTEC/
Description:
Abstract:
The US Total Electron Content (US-TEC) product is designed to specify TEC over the Continental US (CONUS) in near real-time. The product uses a Kalman Filter data assimilation model, described in the Technical Documentation. This technique is driven by data from ground-based Global Positioning System (GPS) dual frequency receivers. The primary data stream comes from the Maritime and Nationwide Differential GPS (M/NDGPS) real time network of stations operated by the US Coast Guard (USCG). As of January 2006, there were about 130 stations ingested into the model. This number has been gradually increasing and will be augmented by Federal Aviation Administration/Wide Area Augmentation System (FAA/WAAS) data, and new stations in areas with poor coverage. This product has evolved through a collaboration between the Space Weather Prediction Center (SWPC), the National Geodetic Survey (NGS), the National Geophysical Data Center (NGDC), and the Global Systems Division (GSD).
Purpose:
The product is designed for single and dual frequency GPS applications. The TEC and slant path maps can be used to estimate the GPS signal delay due to the ionospheric electron content between a receiver and a GPS satellite. Of particular interest to users is the link to Data files which provides not only tabular values of the total electron content, but also values of line-of-sight (LOS) or slant path electron content to each GPS satellite in view over the CONUS. For each GPS satellite in view the LOS maps provide 1 degree x1 degree two-dimensional grids over the CONUS.
Supplemental_Information:
http://www.swpc.noaa.gov/ustec/docs/USTEC_Doc.html
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date:20041014
Ending_Date:Present
Currentness_Reference:
Ground Condition
Status:
Progress:In work
Maintenance_and_Update_Frequency:Daily
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate:-150
East_Bounding_Coordinate:-50
North_Bounding_Coordinate:60
South_Bounding_Coordinate:10
Keywords:
Theme:
Theme_Keyword_Thesaurus:NASA/GCMD Earth Science Keywords
Theme_Keyword:Earth Science > Sun-Earth Interactions > Ionosphere/Magnetosphere Particles
Theme_Keyword:Earth Science > Sun-Earth Interactions > Solar Energetic Particle Properties > Total Electron Content
Theme:
Theme_Keyword_Thesaurus:ISO 19115 Topic Categories
Theme_Keyword:geoscientificInformation
Access_Constraints:none
Use_Constraints:
none
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Contact_Person:Rob Redmon
Contact_Address:
Address_Type:Mailing and Physical
Address:
NOAA/NESDIS/NGDC 325 Broadway
City:Boulder
State_or_Province:CO
Postal_Code:80305
Country:USA
Contact_Voice_Telephone:(303) 497-4331
Contact_Facsimile_Telephone:(303) 497-6513
Contact_Electronic_Mail_Address:ionosphere@noaa.gov
Hours_of_Service:7:30 - 5:00 Mountain
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Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label:USTEC Archive Package
Entity_Type_Definition:
All the USTEC product files are tarred and then g-zipped at the end of the day.
Entity_Type_Definition_Source:
Space Weather Prediction Center (SWPC), National Weather Service, NOAA. USTEC Data/Products Submission Agreement
Attribute:
Attribute_Label:Image files (Portable Network Graphics, PNG)
Attribute_Definition:
96 Vertical Total Electron Content files, 96 Uncertainty in TEC files, 96 Recent Trend files
Attribute_Definition_Source:
Space Weather Prediction Center (SWPC), National Weather Service, NOAA. USTEC Data/Products Submission Agreement
Attribute_Domain_Values:
Unrepresentable_Domain:
Unrepresentable.
Attribute:
Attribute_Label:Daily Empirical Orthonomal Functions
Attribute_Definition:
The EOFs define the background conditions at the beginning of each day. Produced once (1) per day.
Attribute_Definition_Source:
International Reference Ionosphere (IRI)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum:0.00001
Range_Domain_Maximum:1.0000
Attribute_Units_of_Measure:TECU (10**16 electrons/m**2)
Attribute:
Attribute_Label:Coefficients for the EOFs
Attribute_Definition:
These coefficients will adjust the background conditions in function of the data ingested. Produced every 15 minutes (96 files).
Attribute_Definition_Source:
USTEC
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum:-10.0000
Range_Domain_Maximum:10.0000
Attribute_Units_of_Measure:TECU (10**16 electrons/m**2)
Attribute:
Attribute_Label:Vertical and Slant Data Values in Total Electron Content
Attribute_Definition:
Numerical values of the vertical and slant TEC produced every 15 minutes (96 files).
Attribute_Definition_Source:
Space Weather Prediction Center (SWPC), National Weather Service, NOAA
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum:0.0000
Range_Domain_Maximum:100.0000
Attribute_Units_of_Measure:TECU (10**16 electrons/m**2) ** 10
Attribute:
Attribute_Label:TEC Trend
Attribute_Definition:
Deviation of the Vertical TEC from the average of the most recent 10 previous days used in the total electron content assimilation. Produced every 15 minutes (96 files).
Attribute_Definition_Source:
Space Weather Prediction Center (SWPC), National Weather Service, NOAA
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum:-100.0000
Range_Domain_Maximum:100.000
Attribute_Units_of_Measure:TECU (10**16 electrons/m**2)
Attribute:
Attribute_Label:Uncertainty of the vertical TEC
Attribute_Definition:
Expected error of the vertical TEC calculated as a function of the state error and the trend of the values. Produced every 15 minutes (96 files).
Attribute_Definition_Source:
Space Weather Prediction Center (SWPC), National Weather Service, NOAA
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum:2.00
Range_Domain_Maximum:7.00
Attribute_Units_of_Measure:TECU (10**16 electrons/m**2) ** 10
Attribute:
Attribute_Label:Stations used in TEC assimilation
Attribute_Definition:
Data from different sources: CORS (Continuously Operating Reference Stations), GPS-MET (GPS-Meteorological), RTIGS (Real-Time International GNSS Services). Produced every 15 minutes (96 files).
Attribute_Definition_Source:
Space Weather Prediction Center (SWPC), National Weather Service, NOAA
Attribute_Domain_Values:
Unrepresentable_Domain:
Unrepresentable.
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Contact_Person:Rob Redmon
Contact_Address:
Address_Type:Mailing and Physical
Address:
NOAA/NESDIS/NGDC 325 Broadway
City:Boulder
State_or_Province:CO
Postal_Code:80305
Country:USA
Contact_Voice_Telephone:(303) 497-4331
Contact_Facsimile_Telephone:(303) 497-6513
Contact_Electronic_Mail_Address:ionosphere@noaa.gov
Hours_of_Service:7:30 - 5:00 Mountain
Resource_Description:Downloadable Data
Distribution_Liability:
None
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name:ASCII
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:http://www.swpc.noaa.gov/ustec/text/
Network_Resource_Name:http://www.ngdc.noaa.gov/stp/IONO/USTEC/
Network_Resource_Name:http://www.ngdc.noaa.gov/stp/IONO/USTEC/products/
Digital_Form:
Digital_Transfer_Information:
Format_Name:PNG Plots
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:http://www.swpc.noaa.gov/ustec/all_tec_plots.html
Fees:Free download availability
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Metadata_Reference_Information:
Metadata_Date:20101022
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Contact_Person:Rob Redmon
Contact_Address:
Address_Type:Mailing and Physical
Address:
NOAA/NESDIS/NGDC 325 Broadway
City:Boulder
State_or_Province:CO
Postal_Code:80305
Country:USA
Contact_Voice_Telephone:(303) 497-4331
Contact_Facsimile_Telephone:(303) 497-6513
Contact_Electronic_Mail_Address:ionosphere@noaa.gov
Hours_of_Service:7:30 - 5:00 Mountain
Metadata_Standard_Name:Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata
Metadata_Standard_Version:FGDC-STD-012-2002
Metadata_Extensions:
Online_Linkage:http://www.ngdc.noaa.gov/metadata/extensions/local_extensions.html
Profile_Name:NGDC Extensions to FGDC Metadata
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Metadata stylesheets are provided courtesy of ESRI. Copyright (c) 2000-2002, Environmental Systems Research Institute, Inc. All rights reserved.

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Publication date:2010-10-25T14:41:50
Author:Peter Elespuru
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