PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/18-16:42:30
G02     204.7          36.5               10.8 +/-    0.82      16.7 +/-    0.82  0.110 / 0.120
G06     152.4          72.3               10.5 +/-    0.87      11.0 +/-    0.87  0.130 / 0.140
G12     308.3          16.5                9.2 +/-    2.89      22.1 +/-    2.89  0.040 / 0.030
G17     36.0           49.2                7.7 +/-    1.37       9.8 +/-    1.37  0.040 / 0.030
G19     10.3           62.6                8.7 +/-    0.55       9.6 +/-    0.55  0.050 / 0.130
G24     294.5          39.0                8.8 +/-    2.16      13.0 +/-    2.16  0.060 / 0.120
G28     102.4          34.3                8.7 +/-    0.80      13.9 +/-    0.80  0.030 / 0.040