PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-14:42:40
G02     62.3           29.9                9.6 +/-    1.31      16.8 +/-    1.31  0.030 / 0.030
G05     56.3           60.6                9.5 +/-    0.50      10.7 +/-    0.50  0.030 / 0.020
G12     185.7          31.2               10.7 +/-    1.76      18.3 +/-    1.76  0.120 / 0.190
G13     127.8          16.7               14.4 +/-    2.00      34.5 +/-    2.00  0.160 / 0.240
G15     161.6          14.3               12.6 +/-    1.68      31.8 +/-    1.68  0.100 / 0.090
G20     210.1          61.0               11.4 +/-    1.19      12.8 +/-    1.19  0.080 / 0.090
G21     274.5          22.2                7.4 +/-    1.59      15.5 +/-    1.59  0.040 / 0.040
G25     232.1          49.9                9.8 +/-    3.71      12.4 +/-    3.71  0.040 / 0.040
G29     335.4          62.0                8.3 +/-    0.70       9.2 +/-    0.70  0.110 / 0.290