PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-19:57:40
G01     66.7           32.4               11.8 +/-    0.73      19.7 +/-    0.73  0.080 / 0.390
G07     139.4          28.2               14.5 +/-    1.96      26.3 +/-    1.96  0.080 / 0.340
G11     52.0           29.1               10.6 +/-    1.44      18.9 +/-    1.44  0.040 / 0.050
G13     270.2          36.9               14.1 +/-    1.20      21.6 +/-    1.20  0.040 / 0.040
G15     299.8          15.7                9.8 +/-    1.73      23.9 +/-    1.73  0.030 / 0.050
G17     238.3          68.5               14.3 +/-    0.47      15.2 +/-    0.47  0.030 / 0.050
G18     46.7           16.7                9.5 +/-    1.38      22.7 +/-    1.38  0.060 / 0.150
G19     226.9          43.8               17.0 +/-    1.47      23.3 +/-    1.47  0.070 / 0.130
G28     26.1           58.3               12.4 +/-    0.54      14.3 +/-    0.54  0.070 / 0.140
G30     138.8          57.4               14.2 +/-    1.13      16.5 +/-    1.13  0.080 / 0.130