PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/30-16:58:00
G01     58.5           30.0                9.7 +/-    2.39      16.9 +/-    2.39  0.080 / 0.140
G07     143.0          21.0               11.8 +/-    1.19      25.3 +/-    1.19  0.070 / 0.170
G11     47.5           22.4                9.0 +/-    1.76      18.6 +/-    1.76  0.050 / 0.040
G13     260.6          34.7               11.4 +/-    2.23      18.1 +/-    2.23  0.040 / 0.040
G15     294.2          15.6                8.0 +/-    0.88      19.7 +/-    0.88  0.060 / 0.140
G17     263.3          76.4               11.0 +/-    0.63      11.2 +/-    0.63  0.100 / 0.180
G18     41.3           11.8                9.1 +/-    2.76      24.5 +/-    2.76  0.030 / 0.040
G19     233.8          49.5               10.9 +/-    2.28      13.8 +/-    2.28  0.030 / 0.040
G28     38.3           56.2                8.6 +/-    0.70      10.1 +/-    0.70  0.070 / 0.070
G30     144.9          51.1               12.0 +/-    0.77      15.0 +/-    0.77  0.100 / 0.070