2013 May 19 Daily Empirical Ortho-Normal Functions
| 2013 May 19 | Vertical & Slant TEC | TEC Uncertainty | Recent Trend | Stations Used | Coefficients |
|---|---|---|---|---|---|
| 0045 - 0100 UTC | ✓ | ✓ | ✓ | ✓ | ✓ |
| 0030 - 0045 UTC | ✓ | ✓ | ✓ | ✓ | ✓ |
| 0015 - 0030 UTC | ✓ | ✓ | ✓ | ✓ | ✓ |
| 0000 - 0015 UTC | ✓ | ✓ | ✓ | ✓ | ✓ |
Updated: 2013 May 19 0112 UTC Data from a total of 73 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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