PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-21:27:30
G02     60.6           32.5                9.6 +/-    2.47      16.0 +/-    2.47  0.030 / 0.040
G05     55.1           59.1                9.3 +/-    0.70      10.7 +/-    0.70  0.040 / 0.030
G12     181.7          27.3               11.8 +/-    1.08      21.9 +/-    1.08  0.130 / 0.220
G13     126.0          16.8               12.7 +/-    1.99      30.3 +/-    1.99  0.110 / 0.250
G15     164.6          12.9               15.0 +/-    2.82      39.2 +/-    2.82  0.080 / 0.130
G21     272.9          17.9               12.2 +/-    1.79      28.3 +/-    1.79  0.120 / 0.160
G25     232.4          50.1               12.6 +/-    3.81      15.9 +/-    3.81  0.080 / 0.080
G29     328.9          55.6               10.8 +/-    0.82      12.8 +/-    0.82  0.070 / 0.080