PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-12:58:00
G02     202.0          18.6                5.0 +/-    2.08      11.4 +/-    2.08  0.130 / 0.310
G06     168.3          56.7                5.8 +/-    0.83       6.7 +/-    0.83  0.150 / 0.320
G13     225.6          11.9                2.0 +/-    2.08       5.4 +/-    2.08  0.090 / 0.100
G17     25.8           57.2                4.4 +/-    0.48       5.2 +/-    0.48  0.090 / 0.090
G19     313.0          69.8                4.6 +/-    0.49       4.9 +/-    0.49  0.090 / 0.560
G24     307.2          32.9                4.1 +/-    1.54       6.7 +/-    1.54  0.080 / 0.400
G28     89.3           39.5                5.5 +/-    0.76       8.1 +/-    0.76  0.050 / 0.050
G30     157.9          14.4                5.5 +/-    1.93      13.9 +/-    1.93  0.040 / 0.040