Vertical Total Electron Content

Real-time US-Total Electron Content: Vertical and Slant

Presented by the NOAA/Space Environment Center

Vertical TEC

TEC uncertainty

Recent trend

All Plots

Vertical Total Electron Content
2004 Nov 17 1115 - 1130 UTC

Today	Java movie	Javascript movie	Data files
Yesterday	Java movie	Javascript movie	Data files

Updated: 2004 Nov 17 1143 UTC Data from 59 real-time stations over the CORS network are used for these calculations.

The Product is generated by a data assimilation model driven by CORS ground-based GPS data, and is the result of a collaboration between
Space Environment Center and National Geodetic Survey.

The US-TEC product includes maps over the Continental US (CONUS) of

The vertical total electron content (TEC)
An estimate of the uncertainty in the map
The recent trend based on the departure of the TEC from the previous 10-day average
ACSII Data files of the vertical and slant path TEC

In the data files, slant path values specify the line-of-sight electron content to the GPS satellites in view at the time. This ionospheric product is designed to estimate the signal delay for single and dual frequency GPS applications. Note that TEC values in regions outside of the CONUS have no data and should be treated with caution.

Maps and data files are provided for today and yesterday. Prior to yesterday please go to NGDC.

The US Total Electron Content Real-time Specification is an experimental product. Evaluation will begin Nov. 1, 2004 and last until Mar. 22, 2005. We encourage your comments or suggestions for improvements using the electronic survey form provided. Your feedback will help us determine product utility, if modifications are needed, and whether the product should become part of our operational suite.
Product Description Document Nov. 1, 2004 NOAA News Story Feedback Form

User Documentation Technical Documentation Validation Significant Storms

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Send feedback form or questions and comments to Rhonda.Stewart@noaa.gov

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