PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-17:12:30
G02     203.7          32.2               11.8 +/-    1.62      19.8 +/-    1.62  0.110 / 0.080
G06     155.4          69.7               11.9 +/-    0.79      12.6 +/-    0.79  0.050 / 0.080
G12     308.3          18.0               10.5 +/-    1.76      24.3 +/-    1.76  0.080 / 0.140
G17     35.6           49.5                9.2 +/-    0.83      11.6 +/-    0.83  0.080 / 0.130
G19     352.0          66.7               10.2 +/-    0.36      11.0 +/-    0.36  0.030 / 0.030
G24     297.4          38.7               11.3 +/-    3.09      16.7 +/-    3.09  0.030 / 0.030
G28     101.8          31.7               10.4 +/-    0.99      17.6 +/-    0.99  0.040 / 0.030