PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-17:43:10
G01     114.8          21.0               15.1 +/-    1.11      32.4 +/-    1.11  0.060 / 0.110
G07     91.6           64.2               13.3 +/-    0.83      14.6 +/-    0.83  0.060 / 0.090
G08     43.8           29.1                9.5 +/-    0.65      17.0 +/-    0.65  0.030 / 0.030
G09     176.3          21.1               13.5 +/-    1.25      28.9 +/-    1.25  0.030 / 0.030
G11     101.3          41.7               14.7 +/-    0.42      20.8 +/-    0.42  0.030 / 0.040
G13     315.2          23.0               11.0 +/-    1.47      22.4 +/-    1.47  0.030 / 0.050
G17     203.9          27.0               14.2 +/-    0.97      26.4 +/-    0.97  0.040 / 0.090
G18     89.4           22.6               11.8 +/-    0.81      24.4 +/-    0.81  0.050 / 0.070
G28     302.4          59.2               13.4 +/-    0.67      15.3 +/-    0.67  0.040 / 0.070
G30     358.8          73.0               14.7 +/-    0.92      15.3 +/-    0.92  0.040 / 0.060