Ionospheric effects of the 2017 US Solar eclipse observed using a global network of GNSS receivers

The results for the GPS TEC observations are in! The effects of the eclipse can be seen in ground based GNSS TEC receivers quite nicely. The eclipsed region can be seen migrating across the continental US all the way into the Caribbean ocean!

I'm feeling quite happy about how the observation turned out, because I've also played a small role in producing these measurements. Back in 2015, I wrote a new TEC bias determination algorithm for the MIT Haystack Observatory GPS TEC data product, which improved the quality of the maps.
Global vertical equivalent TEC during the eclipse. The observations show that the eclipsed region region has reduced TEC, just as predicted by Huba. Image: MIT Haystack GPS TEC data product. 

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