PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-21:12:50
G02     201.4          28.2               15.8 +/-    1.43      28.8 +/-    1.43  0.180 / 0.380
G06     165.1          62.6               15.0 +/-    1.20      16.7 +/-    1.20  0.150 / 0.290
G12     304.0          11.0                0.5 +/-   24.13       1.4 +/-   24.13  0.070 / 0.140
G17     26.1           56.6               11.3 +/-    0.61      13.2 +/-    0.61  0.060 / 0.090
G19     339.9          69.0               12.0 +/-    0.86      12.8 +/-    0.86  0.080 / 0.110
G24     304.3          34.6               10.9 +/-    1.42      17.5 +/-    1.42  0.080 / 0.120
G28     95.9           35.3               12.1 +/-    0.94      19.0 +/-    0.94  0.050 / 0.040