PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/27-12:27:50
G02     202.7          23.9                4.4 +/-    0.86       8.8 +/-    0.86  0.070 / 0.090
G06     165.3          62.1                5.0 +/-    0.33       5.6 +/-    0.33  0.050 / 0.080
G12     304.2          12.4                2.2 +/-    3.85       5.8 +/-    3.85  0.220 / 0.230
G17     31.0           53.2                3.0 +/-    0.76       3.6 +/-    0.76  0.140 / 0.260
G19     329.6          69.3                3.3 +/-    0.86       3.5 +/-    0.86  0.050 / 0.030
G24     302.8          36.3                3.7 +/-    1.92       5.7 +/-    1.92  0.030 / 0.020
G28     94.6           36.6                4.3 +/-    0.85       6.6 +/-    0.85  0.040 / 0.030