IONOSPHERIC EFFECTS OF THE SOLAR ECLIPSE --- Figure 1

Figure 2a.
Geometry of the GPS-interferometer GPSINT. A, B, C — reception sites spaced by about 3.5 km where dual-frequency multichannel GPS receivers are installed. Parallel lines represent the lines of equal TEC according simple model; the arrow shows the direction of a normal a (to these lines); and N and E are the directions to the north (axis Y) and to the east (axis X).