PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-04:57:40
G02     210.6          55.9                6.9 +/-    0.46       8.1 +/-    0.46  0.110 / 0.220
G06     94.9           80.6                3.4 +/-    0.68       3.5 +/-    0.68  0.100 / 0.150
G12     316.0          29.0                2.3 +/-    1.47       4.2 +/-    1.47  0.030 / 0.020
G17     51.5           37.5                2.5 +/-    1.42       3.8 +/-    1.42  0.030 / 0.020
G19     32.4           53.0                3.2 +/-    1.05       3.9 +/-    1.05  0.030 / 0.040
G24     275.3          42.1                2.6 +/-    2.10       3.6 +/-    2.10  0.050 / 0.050
G28     118.6          17.7                4.0 +/-    1.12       9.3 +/-    1.12  0.080 / 0.090