PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-10:12:40
G01     118.0          18.6                4.7 +/-    0.99      10.6 +/-    0.99  0.040 / 0.030
G07     86.1           64.1                4.9 +/-    0.43       5.4 +/-    0.43  0.030 / 0.040
G08     44.1           28.9                1.4 +/-    0.63       2.5 +/-    0.63  0.030 / 0.040
G09     175.5          23.4                5.3 +/-    1.16      10.8 +/-    1.16  0.030 / 0.030
G11     103.4          39.1                6.1 +/-    0.49       9.0 +/-    0.49  0.130 / 0.170
G13     318.2          18.4                2.2 +/-    0.86       5.1 +/-    0.86  0.130 / 0.180
G17     201.3          28.0                4.0 +/-    1.37       7.4 +/-    1.37  0.150 / 0.310
G28     295.6          57.9                3.7 +/-    1.12       4.2 +/-    1.12  0.120 / 0.330
G30     346.3          68.4                3.8 +/-    0.61       4.0 +/-    0.61  0.050 / 0.090