There is a current system flowing high up in Earth’s ionosphere near 110 km. These currents are driven by winds that blow in the upper atmosphere. NASA’s ICON satellite watches both the winds and the electric fields that help create these currents. Another satellite, Swarm from Europe, measures the same currents by looking at how they affect Earth’s magnetic field. We compared what the two satellites see. They are clearly related, but the current measured by ICON looks about five times stronger than what Swarm sees. That is strange, because they should be measuring the same thing. We think the difference may come from how we estimate something called conductivity, which is needed to calculate the currents. This depends on how many free electrons are in the atmosphere, especially in a region called the E region. In this study, we look at whether using the real data-informed electron density model helps us make better estimates. We also explore what kind of conditions would make both satellites agree on how strong the currents really are.