PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-13:57:40
G02     218.1          57.6                7.2 +/-    0.71       8.4 +/-    0.71  0.100 / 0.090
G06     53.7           72.2                8.1 +/-    0.53       8.5 +/-    0.53  0.090 / 0.080
G12     319.8          40.2                6.1 +/-    1.16       8.9 +/-    1.16  0.060 / 0.090
G17     59.5           30.0                7.0 +/-    0.76      12.3 +/-    0.76  0.050 / 0.070
G19     35.6           51.7                5.7 +/-    0.30       7.1 +/-    0.30  0.040 / 0.040
G24     259.8          41.7                5.8 +/-    1.40       8.2 +/-    1.40  0.040 / 0.040
G28     123.3          13.5                8.8 +/-    1.37      22.6 +/-    1.37  0.040 / 0.060