PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/12-10:58:10
G01     88.9           32.1                5.1 +/-    0.78       8.5 +/-    0.78  0.020 / 0.030
G07     126.7          43.9                7.8 +/-    1.33      10.7 +/-    1.33  0.020 / 0.030
G11     66.1           38.6                5.8 +/-    1.22       8.6 +/-    1.22  0.090 / 0.100
G13     292.9          36.6                7.6 +/-    2.68      11.7 +/-    2.68  0.110 / 0.110
G17     215.0          56.3                7.6 +/-    0.74       9.0 +/-    0.74  0.110 / 0.100
G18     61.4           23.0                3.8 +/-    1.73       7.7 +/-    1.73  0.100 / 0.110
G19     215.5          23.7                7.5 +/-    2.18      15.1 +/-    2.18  0.050 / 0.050
G28     349.5          61.7                5.7 +/-    0.55       6.4 +/-    0.55  0.040 / 0.040
G30     105.2          76.9                6.6 +/-    0.36       6.8 +/-    0.36  0.050 / 0.050