PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/29-21:27:40
G02     62.1           31.4               10.1 +/-    1.65      17.2 +/-    1.65  0.040 / 0.030
G05     53.1           57.5               10.4 +/-    0.68      12.1 +/-    0.68  0.030 / 0.040
G12     181.4          25.4               10.5 +/-    1.42      20.4 +/-    1.42  0.050 / 0.150
G13     124.5          18.1               13.1 +/-    1.13      30.2 +/-    1.13  0.070 / 0.140
G15     163.6          14.3               12.3 +/-    1.67      31.2 +/-    1.67  0.060 / 0.100
G21     274.4          19.0               10.2 +/-    1.98      23.1 +/-    1.98  0.050 / 0.090
G25     230.1          48.7               12.2 +/-    0.67      15.6 +/-    0.67  0.040 / 0.070
G29     330.0          57.4               10.2 +/-    0.47      11.9 +/-    0.47  0.060 / 0.060