PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-14:57:50
G02     245.5          73.9                7.7 +/-    0.37       8.0 +/-    0.37  0.080 / 0.120
G05     172.8          16.8                7.9 +/-    2.46      18.8 +/-    2.46  0.080 / 0.090
G06     40.2           54.4                7.1 +/-    0.91       8.5 +/-    0.91  0.040 / 0.040
G12     322.2          58.3                7.5 +/-    0.68       8.6 +/-    0.68  0.030 / 0.040
G17     74.0           19.2                5.9 +/-    1.32      13.1 +/-    1.32  0.160 / 0.290
G19     56.4           40.6                6.7 +/-    1.35       9.7 +/-    1.35  0.150 / 0.320
G24     239.2          32.7                8.6 +/-    2.34      14.2 +/-    2.34  0.210 / 0.350
G25     317.1          16.8                5.0 +/-    1.88      11.9 +/-    1.88  0.260 / 0.350