PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/18-13:12:40
G01     106.2          25.0                7.1 +/-    0.82      13.8 +/-    0.82  0.030 / 0.050
G07     108.8          54.7                6.6 +/-    0.56       7.9 +/-    0.56  0.030 / 0.040
G08     42.2           23.2                6.1 +/-    1.51      12.5 +/-    1.51  0.040 / 0.060
G09     175.3          14.8                4.5 +/-    2.29      11.3 +/-    2.29  0.070 / 0.050
G11     89.0           43.7                7.6 +/-    1.36      10.5 +/-    1.36  0.060 / 0.080
G13     309.2          29.6                5.8 +/-    1.26      10.3 +/-    1.26  0.070 / 0.090
G17     205.7          34.4                8.1 +/-    1.60      13.0 +/-    1.60  0.170 / 0.250
G28     305.7          58.3                5.4 +/-    1.42       6.2 +/-    1.42  0.150 / 0.260
G30     28.4           78.4                6.3 +/-    1.10       6.5 +/-    1.10  0.060 / 0.160