PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/09-13:42:40
G07     30.4           69.4                8.7 +/-    0.88       9.2 +/-    0.88  0.050 / 0.050
G08     56.8           44.7                7.9 +/-    0.64      10.8 +/-    0.64  0.040 / 0.040
G09     177.8          42.5                9.7 +/-    2.14      13.6 +/-    2.14  0.080 / 0.150
G11     125.1          31.0                8.9 +/-    0.76      15.3 +/-    0.76  0.120 / 0.140
G18     110.0          13.0                7.7 +/-    2.70      20.2 +/-    2.70  0.080 / 0.150
G23     160.0          13.0                8.8 +/-    4.77      22.9 +/-    4.77  0.090 / 0.150
G27     38.7           13.0                6.7 +/-    1.19      17.6 +/-    1.19  0.030 / 0.040
G28     265.7          48.8                8.9 +/-    0.94      11.4 +/-    0.94  0.020 / 0.040
G30     324.7          54.2                8.3 +/-    1.09       9.9 +/-    1.09  0.060 / 0.080