Fig. 10
From: 3D tomography of midlatitude sporadic-E in Japan from GNSS-TEC data
Results of the checkerboard test for Case 5 using both GPS and GLONASS data (top), GPS data only (middle), and GLONASS data only (bottom). In each case, we give map views at two different altitudes, namely 90–120 km (a1–a3) and 240–270 km (b1–b3), and latitude–height profile in (e1–e3), and two longitude-height profiles in (c1–c3, d1–d3)