PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-13:57:40
G01     118.4          18.4               10.7 +/-    1.11      24.5 +/-    1.11  0.030 / 0.020
G07     82.5           66.2               10.5 +/-    0.41      11.4 +/-    0.41  0.030 / 0.020
G08     44.5           30.4                8.8 +/-    1.30      15.2 +/-    1.30  0.030 / 0.030
G09     175.8          23.8               10.4 +/-    0.94      20.9 +/-    0.94  0.030 / 0.020
G11     105.1          40.3               11.6 +/-    0.91      16.8 +/-    0.91  0.170 / 0.370
G13     317.2          20.2                7.4 +/-    1.74      16.1 +/-    1.74  0.130 / 0.340
G17     201.9          25.2               10.8 +/-    3.84      21.0 +/-    3.84  0.100 / 0.230
G18     93.1           21.1                9.9 +/-    1.48      21.1 +/-    1.48  0.110 / 0.190
G28     294.0          57.6                8.3 +/-    1.64       9.6 +/-    1.64  0.110 / 0.150
G30     346.4          68.8               10.3 +/-    0.42      11.0 +/-    0.42  0.110 / 0.170