PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/11-10:42:40
G01     99.5           29.0                4.5 +/-    1.34       8.1 +/-    1.34  0.030 / 0.020
G07     117.1          51.9                6.1 +/-    0.42       7.5 +/-    0.42  0.030 / 0.020
G08     41.6           12.6                2.1 +/-    1.32       5.4 +/-    1.32  0.090 / 0.120
G11     77.4           41.8                3.8 +/-    1.27       5.3 +/-    1.27  0.090 / 0.120
G13     303.0          33.0                3.0 +/-    1.51       5.0 +/-    1.51  0.080 / 0.120
G17     208.7          46.7                9.8 +/-    0.69      12.9 +/-    0.69  0.060 / 0.150
G18     71.2           24.3                4.1 +/-    1.10       8.2 +/-    1.10  0.040 / 0.040
G19     211.8          15.4                5.8 +/-    1.42      14.3 +/-    1.42  0.030 / 0.040
G28     330.7          61.7                4.3 +/-    0.53       4.8 +/-    0.53  0.080 / 0.130
G30     55.0           80.5                5.7 +/-    0.93       5.8 +/-    0.93  0.080 / 0.160