PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-09:12:50
G01     125.3          13.0                3.4 +/-    2.85       8.9 +/-    2.85  0.040 / 0.040
G07     61.3           68.8                4.9 +/-    0.35       5.2 +/-    0.35  0.030 / 0.040
G08     48.0           36.0                2.2 +/-    1.17       3.4 +/-    1.17  0.030 / 0.040
G09     174.3          29.3                6.2 +/-    0.55      11.0 +/-    0.55  0.020 / 0.040
G11     114.3          36.7                6.2 +/-    0.88       9.5 +/-    0.88  0.100 / 0.350
G13     320.4          13.7                2.0 +/-    1.92       5.1 +/-    1.92  0.140 / 0.370
G17     199.6          18.4                4.5 +/-    1.07      10.2 +/-    1.07  0.120 / 0.310
G18     100.3          17.7                4.2 +/-    1.51       9.7 +/-    1.51  0.140 / 0.330
G28     278.5          53.4                5.5 +/-    0.57       6.7 +/-    0.57  0.090 / 0.310
G30     333.2          61.1                3.0 +/-    0.61       3.3 +/-    0.61  0.090 / 0.350