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

Presented by the NOAA/Space Environment Center

Vertical and Slant Total Electron Content (2004 Nov 17)

README
2004 Nov 17 0830 - 0845 UTC      stations used
2004 Nov 17 0815 - 0830 UTC      stations used
2004 Nov 17 0800 - 0815 UTC      stations used
2004 Nov 17 0745 - 0800 UTC      stations used
2004 Nov 17 0730 - 0745 UTC      stations used
2004 Nov 17 0715 - 0730 UTC      stations used
2004 Nov 17 0700 - 0715 UTC      stations used
2004 Nov 17 0645 - 0700 UTC      stations used
2004 Nov 17 0630 - 0645 UTC      stations used
2004 Nov 17 0615 - 0630 UTC      stations used
2004 Nov 17 0600 - 0615 UTC      stations used
2004 Nov 17 0545 - 0600 UTC      stations used
2004 Nov 17 0530 - 0545 UTC      stations used
2004 Nov 17 0515 - 0530 UTC      stations used
2004 Nov 17 0500 - 0515 UTC      stations used
2004 Nov 17 0445 - 0500 UTC      stations used
2004 Nov 17 0430 - 0445 UTC      stations used
2004 Nov 17 0415 - 0430 UTC      stations used
2004 Nov 17 0400 - 0415 UTC      stations used
2004 Nov 17 0345 - 0400 UTC      stations used
2004 Nov 17 0330 - 0345 UTC      stations used
2004 Nov 17 0315 - 0330 UTC      stations used
2004 Nov 17 0300 - 0315 UTC      stations used
2004 Nov 17 0245 - 0300 UTC      stations used
2004 Nov 17 0230 - 0245 UTC      stations used
2004 Nov 17 0215 - 0230 UTC      stations used
2004 Nov 17 0200 - 0215 UTC      stations used
2004 Nov 17 0145 - 0200 UTC      stations used
2004 Nov 17 0130 - 0145 UTC      stations used
2004 Nov 17 0115 - 0130 UTC      stations used
2004 Nov 17 0100 - 0115 UTC      stations used
2004 Nov 17 0045 - 0100 UTC      stations used
2004 Nov 17 0030 - 0045 UTC      stations used
2004 Nov 17 0015 - 0030 UTC      stations used
2004 Nov 17 0000 - 0015 UTC      stations used

Updated: 2004 Nov 17 0858 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

  1. The vertical total electron content (TEC)
  2. An estimate of the uncertainty in the map
  3. The recent trend based on the departure of the TEC from the previous 10-day average
  4. 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    

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

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