PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/18-05:27:50
G02     199.5          22.2                4.8 +/-    1.87      10.0 +/-    1.87  0.070 / 0.120
G06     175.4          50.5                4.3 +/-    0.97       5.4 +/-    0.97  0.100 / 0.110
G13     228.4          13.4                3.8 +/-    3.57       9.7 +/-    3.57  0.030 / 0.030
G17     21.2           60.3                2.7 +/-    0.99       3.0 +/-    0.99  0.060 / 0.030
G19     324.9          71.2                2.2 +/-    0.55       2.3 +/-    0.55  0.080 / 0.110
G24     311.0          28.5                0.9 +/-    0.90       1.6 +/-    0.90  0.060 / 0.090
G28     88.3           39.3                5.5 +/-    0.75       8.1 +/-    0.75  0.030 / 0.040
G30     156.1          12.3                4.7 +/-    4.25      12.6 +/-    4.25  0.040 / 0.040