Any delays or offsets in the travel time of the signals will cause errors in the measured GPS location. The time it takes the signal to travel from the travel to the receiver (and vis versa) is essential to correctly calculating locations using GPS. It's answering the same question in a different way.Īs you've probably read in your background research, GPS receivers communicate with GPS satellites using electromagnetic waves. The IGP delay is one of the factors in the WAAS correction, so this strategy (comparing IGP delay with geomagnetic storm data), will still let you evaluate the relationship between the WAAS correction and magnetic activity.

Instead of comparing Kp with the 'error' you calculate between WAAS-enabled and non-WAAS-enabled GPS measurements, you can look at the correlation between the Kp index and the ionospheric grid point (IGP) delay in WAAS.

It's not as straightforward, but should lead to a similar result. But, if you do not, don't give up yet! I think there's another approach to this project that will work for you. You can comment on the effect of sunspot activity and the solar minimum in the discussion and conclusions section of your project.īased on your earlier posts, it sounds like you DO have a GPS that can make WAAS-on and WAAS-off measurements. If you have a GPS that would work for the project, I strongly recommend doing the project with the GPS. None of these include both WAAS on and WAAS off measurements, so none of these would work for the project. I've been able to find several publicly available GPS data sets from NOAA, NASA, the USGS, US Coast Guard, Department of Homeland Security, and USAID. Looking at the project, you need data from a single GPS station that made repeated measurements with WAAS on and WAAS off. Finding the historical GPS data you need will be tricky.

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