PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-12:28:00
G03     225.7          67.7                6.6 +/-    1.22       7.1 +/-    1.22  0.040 / 0.040
G07     249.4          12.8                6.2 +/-    1.05      16.2 +/-    1.05  0.050 / 0.050
G09     303.1          17.3                5.4 +/-    2.75      12.6 +/-    2.75  0.250 / 0.210
G14     100.0          13.6                6.6 +/-    2.52      17.0 +/-    2.52  0.180 / 0.240
G16     130.4          58.3                8.7 +/-    0.58      10.0 +/-    0.58  0.050 / 0.040
G22     191.2          52.5                8.3 +/-    0.91      10.1 +/-    0.91  0.060 / 0.040
G23     320.5          50.5                6.6 +/-    1.13       8.2 +/-    1.13  0.140 / 0.360
G26     70.6           52.6                5.4 +/-    0.49       6.6 +/-    0.49  0.100 / 0.390
G31     52.7           19.0                5.7 +/-    2.08      12.9 +/-    2.08  0.300 / 0.220