PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-09:42:50
G01     112.2          22.6                5.7 +/-    1.81      11.7 +/-    1.81  0.030 / 0.030
G07     98.6           61.3                7.0 +/-    0.38       7.9 +/-    0.38  0.030 / 0.030
G08     42.2           23.0                3.0 +/-    1.62       6.1 +/-    1.62  0.120 / 0.170
G09     172.7          14.3                3.0 +/-    2.78       7.6 +/-    2.78  0.090 / 0.130
G11     94.6           42.1                7.0 +/-    0.77       9.9 +/-    0.77  0.030 / 0.020
G13     313.2          25.5                3.2 +/-    1.58       6.2 +/-    1.58  0.030 / 0.030
G17     203.2          34.1                5.9 +/-    0.65       9.5 +/-    0.65  0.140 / 0.200
G18     84.6           23.0                5.0 +/-    2.51      10.2 +/-    2.51  0.140 / 0.220
G28     305.6          59.4                4.5 +/-    0.95       5.1 +/-    0.95  0.100 / 0.130
G30     358.5          73.9                5.3 +/-    1.11       5.5 +/-    1.11  0.110 / 0.180