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

Presented by the NOAA/Space Weather Prediction Center

Vertical and Slant Total Electron Content, TEC uncertainty, Difference from 10-day average, GPS stations used, Coefficients, and Daily Empirical Ortho-Normal Functions in the calculations for 2008 Jul 09

Data Files Format

2008 Jul 09     Daily Empirical Ortho-Normal Functions

2008 Jul 09 Vertical & Slant TEC TEC Uncertainty Recent Trend Stations Used Coefficients
0245 - 0300 UTC ✓ ✓ ✓ ✓ ✓
0230 - 0245 UTC ✓ ✓ ✓ ✓ ✓
0215 - 0230 UTC ✓ ✓ ✓ ✓ ✓
0200 - 0215 UTC ✓ ✓ ✓ ✓ ✓
0145 - 0200 UTC ✓ ✓ ✓ ✓ ✓
0130 - 0145 UTC ✓ ✓ ✓ ✓ ✓
0115 - 0130 UTC ✓ ✓ ✓ ✓ ✓
0100 - 0115 UTC ✓ ✓ ✓ ✓ ✓
0045 - 0100 UTC ✓ ✓ ✓ ✓ ✓
0030 - 0045 UTC ✓ ✓ ✓ ✓ ✓
0015 - 0030 UTC ✓ ✓ ✓ ✓ ✓
0000 - 0015 UTC ✓ ✓ ✓ ✓ ✓

Updated: 2008 Jul 09 0314 UTC     Data from a total of 87  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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