PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/31-11:57:50
G01     83.5           32.9                2.8 +/-    0.35       4.7 +/-    0.35  0.030 / 0.040
G07     130.3          40.3                4.6 +/-    1.40       6.7 +/-    1.40  0.030 / 0.040
G11     61.2           36.0                2.5 +/-    0.51       3.9 +/-    0.51  0.050 / 0.080
G13     287.5          37.6                4.5 +/-    1.16       6.8 +/-    1.16  0.040 / 0.080
G17     218.9          61.4                5.5 +/-    1.04       6.1 +/-    1.04  0.050 / 0.100
G18     57.5           22.0                1.3 +/-    0.70       2.7 +/-    0.70  0.060 / 0.100
G19     217.5          28.5                5.6 +/-    1.06      10.2 +/-    1.06  0.070 / 0.190
G28     359.4          61.3                3.7 +/-    0.57       4.1 +/-    0.57  0.060 / 0.210
G30     117.7          73.8                6.0 +/-    0.92       6.3 +/-    0.92  0.050 / 0.120