PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-14:12:40
G03     219.3          66.3                8.5 +/-    0.90       9.2 +/-    0.90  0.040 / 0.070
G07     250.2          13.5                7.4 +/-    3.97      19.2 +/-    3.97  0.060 / 0.070
G09     303.9          18.3                6.9 +/-    1.28      15.7 +/-    1.28  0.150 / 0.320
G14     101.1          12.6                9.7 +/-    1.79      25.4 +/-    1.79  0.150 / 0.250
G16     130.9          58.9               11.3 +/-    0.52      13.0 +/-    0.52  0.050 / 0.050
G22     188.6          50.0                9.6 +/-    0.97      12.1 +/-    0.97  0.040 / 0.050
G23     320.7          50.6                7.9 +/-    1.21       9.8 +/-    1.21  0.120 / 0.430
G26     69.8           52.7                8.4 +/-    0.59      10.3 +/-    0.59  0.130 / 0.440
G31     53.0           18.8                8.2 +/-    1.05      18.6 +/-    1.05  0.030 / 0.050