PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/09-14:57:40
G02     219.3          57.9                9.8 +/-    1.28      11.4 +/-    1.28  0.060 / 0.050
G06     51.3           70.9                8.5 +/-    0.42       9.0 +/-    0.42  0.060 / 0.060
G12     320.4          42.1                8.6 +/-    0.58      12.1 +/-    0.58  0.090 / 0.050
G17     60.3           29.5                6.6 +/-    1.72      11.7 +/-    1.72  0.060 / 0.080
G19     37.1           51.0                8.8 +/-    2.00      10.9 +/-    2.00  0.030 / 0.030
G24     258.7          41.2               10.5 +/-    3.31      15.0 +/-    3.31  0.030 / 0.030
G28     124.1          12.4                7.5 +/-    1.93      19.7 +/-    1.93  0.050 / 0.050