PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-14:42:30
G01     99.6           28.7                9.2 +/-    0.93      16.6 +/-    0.93  0.080 / 0.150
G07     117.2          49.3               10.2 +/-    0.59      13.0 +/-    0.59  0.070 / 0.110
G08     41.7           12.8                5.3 +/-    3.11      13.9 +/-    3.11  0.040 / 0.030
G11     77.1           39.8                7.6 +/-    0.89      11.0 +/-    0.89  0.040 / 0.020
G13     305.4          31.0               10.3 +/-    1.18      17.7 +/-    1.18  0.040 / 0.040
G17     208.4          47.4               10.1 +/-    0.83      13.1 +/-    0.83  0.050 / 0.050
G19     210.9          20.8               11.8 +/-    2.77      25.5 +/-    2.77  0.100 / 0.150
G28     331.8          61.5                7.6 +/-    1.09       8.5 +/-    1.09  0.120 / 0.110
G30     45.6           80.0                9.0 +/-    0.73       9.1 +/-    0.73  0.040 / 0.050