PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/27-11:28:10
G02     201.8          30.4                6.6 +/-    1.43      11.4 +/-    1.43  0.040 / 0.110
G06     169.8          62.3                7.3 +/-    0.52       8.2 +/-    0.52  0.040 / 0.100
G12     305.0          11.0               -5.4 +/-   11.54     -14.7 +/-   11.54  0.130 / 0.420
G17     34.0           50.9                4.2 +/-    0.54       5.3 +/-    0.54  0.130 / 0.310
G19     355.9          67.1                4.2 +/-    0.84       4.6 +/-    0.84  0.060 / 0.080
G24     304.0          34.5                3.1 +/-    1.24       4.9 +/-    1.24  0.070 / 0.090
G28     98.7           33.5                5.7 +/-    0.60       9.3 +/-    0.60  0.040 / 0.030