PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-13:42:40
G02     205.0          31.2                5.4 +/-    1.31       9.2 +/-    1.31  0.040 / 0.030
G06     155.0          70.7                5.6 +/-    0.99       5.9 +/-    0.99  0.030 / 0.040
G12     308.9          19.0                3.7 +/-    0.88       8.4 +/-    0.88  0.060 / 0.130
G17     38.0           47.4                3.9 +/-    0.31       5.1 +/-    0.31  0.070 / 0.150
G19     350.7          66.5                2.5 +/-    0.34       2.7 +/-    0.34  0.110 / 0.080
G24     294.7          40.2                3.5 +/-    0.58       5.1 +/-    0.58  0.070 / 0.080
G28     102.8          31.4                6.3 +/-    1.16      10.7 +/-    1.16  0.060 / 0.120