PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/27-12:27:30
G02     202.7          23.9                4.3 +/-    2.31       8.5 +/-    2.31  0.250 / 0.280
G06     165.3          62.1                7.4 +/-    1.24       8.2 +/-    1.24  0.150 / 0.320
G12     304.2          12.4                2.2 +/-    1.01       5.8 +/-    1.01  0.100 / 0.270
G17     31.0           53.2                3.2 +/-    0.82       3.9 +/-    0.82  0.090 / 0.270
G19     329.6          69.3                4.0 +/-    0.70       4.3 +/-    0.70  0.060 / 0.080
G24     302.8          36.3                4.0 +/-    1.81       6.1 +/-    1.81  0.060 / 0.090
G28     94.6           36.6                3.3 +/-    0.62       5.1 +/-    0.62  0.050 / 0.040
G30     158.3          9.9                 4.6 +/-    3.30      12.9 +/-    3.30  0.040 / 0.030