PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/30-12:27:30
G02     204.0          29.6                6.1 +/-    0.79      10.8 +/-    0.79  0.150 / 0.270
G06     159.6          68.0                6.6 +/-    1.27       7.0 +/-    1.27  0.080 / 0.230
G12     307.3          16.3                2.7 +/-    2.94       6.6 +/-    2.94  0.070 / 0.080
G17     36.1           48.9                4.0 +/-    0.26       5.1 +/-    0.26  0.070 / 0.080
G19     345.7          67.5                3.6 +/-    0.54       3.9 +/-    0.54  0.040 / 0.050
G24     297.1          39.4                3.5 +/-    1.42       5.1 +/-    1.42  0.040 / 0.040
G28     100.3          33.2                4.7 +/-    0.92       7.7 +/-    0.92  0.040 / 0.040