PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/23-16:27:40
G02     230.0          68.5                9.6 +/-    0.96      10.2 +/-    0.96  0.120 / 0.360
G05     174.1          11.7                3.2 +/-   26.52       8.5 +/-   26.52  0.120 / 0.440
G06     42.6           60.6                9.3 +/-    0.61      10.5 +/-    0.61  0.050 / 0.090
G12     322.8          52.4                9.3 +/-    0.82      11.3 +/-    0.82  0.070 / 0.090
G17     68.0           23.6                7.7 +/-    1.42      15.5 +/-    1.42  0.040 / 0.040
G19     49.0           44.6                9.4 +/-    1.23      12.8 +/-    1.23  0.040 / 0.040
G24     248.1          37.2                9.9 +/-    1.82      15.1 +/-    1.82  0.040 / 0.040