Fig. 5From: Performance of the double-thin-shell approach for studying nighttime medium-scale traveling ionospheric disturbances using two dense GNSS observation networks in Japana, b Solvability of different datasets at the original resolution, using GPS and multi-GNSS signal rays from GEONET (G) and SoftBank (S) on July 3 (DOY 184), 2022. c–f Increased unsolvability resulting from the improved spatial resolution when compared to the case at the original resolution shown in subplots (a, b)Back to article page