PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-14:27:30
G02     204.0          31.5                8.9 +/-    1.19      15.1 +/-    1.19  0.090 / 0.320
G06     157.4          69.0                9.0 +/-    1.02       9.6 +/-    1.02  0.120 / 0.340
G12     306.5          14.6                5.5 +/-    3.92      13.9 +/-    3.92  0.040 / 0.120
G17     31.8           52.4                6.9 +/-    1.02       8.5 +/-    1.02  0.050 / 0.140
G19     3.9            64.8                6.4 +/-    0.40       6.9 +/-    0.40  0.060 / 0.130
G24     298.9          37.0                8.3 +/-    0.80      12.6 +/-    0.80  0.060 / 0.130
G28     98.3           37.2                8.9 +/-    0.56      13.7 +/-    0.56  0.070 / 0.100