PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/06-21:57:40
G02     199.7          19.5               17.2 +/-    1.55      38.5 +/-    1.55  0.070 / 0.120
G06     171.0          52.1               13.6 +/-    0.86      16.7 +/-    0.86  0.090 / 0.160
G13     229.0          14.5               17.5 +/-    2.72      44.1 +/-    2.72  0.150 / 0.370
G17     12.9           64.2               11.5 +/-    0.61      12.7 +/-    0.61  0.140 / 0.320
G19     311.4          70.9               11.2 +/-    0.66      11.8 +/-    0.66  0.040 / 0.080
G24     311.4          28.1               10.7 +/-    1.21      19.4 +/-    1.21  0.050 / 0.090
G28     85.8           40.7               13.3 +/-    1.45      19.2 +/-    1.45  0.030 / 0.050
G30     156.5          15.6               16.5 +/-    1.71      40.5 +/-    1.71  0.040 / 0.050