Data Files Format
2013 Dec 05 Daily Empirical Ortho-Normal Functions
|2013 Dec 05||Vertical & Slant TEC||TEC Uncertainty||Recent Trend||Stations Used||Coefficients|
|0000 - 0015 UTC||✓||✓||✓||✓||✓|
Updated: 2013 Dec 05 0031 UTC Data from a total of 82 real-time GPS stations from the CORS , GPS/Met, and IGS networks are used for these calculations.
US-TEC provides vertical TEC and slant path values of the line-of-sight electron content to the GPS satellites in view at the time. Note that TEC values in regions outside of the CONUS have no data and should be treated with caution. This ionospheric product is designed to estimate the signal delay for single and dual frequency GPS applications. US-TEC products are provided for today and yesterday, prior to yesterday please go to NGDC.
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