PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-23:58:00
G08     281.9          22.9                9.3 +/-    1.41      19.0 +/-    1.41  0.100 / 0.120
G10     29.6           62.5                8.6 +/-    0.42       9.6 +/-    0.42  0.090 / 0.130
G14     239.7          54.0                9.5 +/-    1.93      11.4 +/-    1.93  0.050 / 0.170
G18     317.2          19.0                6.4 +/-    0.75      14.3 +/-    0.75  0.050 / 0.150
G20     78.1           46.7                8.5 +/-    0.56      11.2 +/-    0.56  0.080 / 0.130
G21     150.8          30.7               11.1 +/-    0.78      19.2 +/-    0.78  0.070 / 0.140
G24     46.7           18.6                7.2 +/-    1.22      16.3 +/-    1.22  0.040 / 0.080
G27     245.7          26.3               11.1 +/-    1.16      21.1 +/-    1.16  0.040 / 0.070
G31     181.2          15.5               13.6 +/-    2.48      33.4 +/-    2.48  0.030 / 0.030
G32     276.5          75.3                8.5 +/-    0.63       8.8 +/-    0.63  0.020 / 0.030