PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/13-11:57:40
G01     118.9          18.0                2.5 +/-    1.45       5.8 +/-    1.45  0.030 / 0.040
G07     81.3           66.3                3.2 +/-    0.27       3.4 +/-    0.27  0.040 / 0.040
G08     44.3           29.6                1.7 +/-    0.76       3.1 +/-    0.76  0.030 / 0.050
G09     175.3          23.7                3.5 +/-    2.34       7.0 +/-    2.34  0.020 / 0.040
G11     105.0          40.0                3.0 +/-    0.73       4.4 +/-    0.73  0.110 / 0.280
G13     317.5          19.8                2.6 +/-    3.54       5.7 +/-    3.54  0.120 / 0.260
G17     201.2          25.9                2.2 +/-    1.30       4.2 +/-    1.30  0.040 / 0.060
G18     93.4           20.8                2.3 +/-    0.47       4.9 +/-    0.47  0.040 / 0.060
G28     292.7          57.3                3.9 +/-    1.10       4.5 +/-    1.10  0.090 / 0.170
G30     343.8          67.7                0.9 +/-    0.86       1.0 +/-    0.86  0.090 / 0.150