PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-10:27:40
G01     94.6           30.7                5.4 +/-    0.60       9.4 +/-    0.60  0.030 / 0.030
G07     122.0          48.1                5.6 +/-    0.58       7.2 +/-    0.58  0.030 / 0.030
G11     71.7           40.5                5.3 +/-    0.40       7.6 +/-    0.40  0.050 / 0.060
G13     298.5          35.0                4.3 +/-    1.29       6.9 +/-    1.29  0.040 / 0.050
G17     211.3          51.4                6.4 +/-    0.90       7.9 +/-    0.90  0.080 / 0.120
G18     66.3           23.9                3.5 +/-    1.38       7.0 +/-    1.38  0.070 / 0.140
G19     213.4          19.4                5.4 +/-    2.73      12.1 +/-    2.73  0.070 / 0.120
G28     339.5          61.8                4.5 +/-    0.66       5.1 +/-    0.66  0.060 / 0.140
G30     82.4           79.7                5.5 +/-    0.66       5.6 +/-    0.66  0.070 / 0.160