Illustration of the horizontal definition of the MIGRAS products NeGIX (left) and TEGIX (right). Both Swarm data products utilize measurements from Swarm satellites A and C, with a latitudinal resolution of 0.5° along their orbital paths, as shown on the Earth globe in the center. The data combination approach for their definition differs due to the geometry of in-situ LP measurements for NeGIX and the availability of GNSS-derived TEC data for TEGIX.