PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/04-11:43:10
G01     82.1           33.0                2.0 +/-    1.46       3.2 +/-    1.46  0.030 / 0.020
G07     131.1          39.3                3.9 +/-    0.60       5.7 +/-    0.60  0.030 / 0.060
G11     60.1           35.3                3.6 +/-    1.15       5.7 +/-    1.15  0.070 / 0.090
G13     286.1          37.8                3.1 +/-    1.28       4.7 +/-    1.28  0.060 / 0.090
G17     220.0          62.7                5.3 +/-    1.50       5.9 +/-    1.50  0.050 / 0.100
G18     56.5           21.6                3.5 +/-    3.53       7.3 +/-    3.53  0.080 / 0.110
G19     218.1          29.4                4.3 +/-    2.04       7.6 +/-    2.04  0.060 / 0.060
G28     1.5            61.1                3.0 +/-    0.66       3.4 +/-    0.66  0.070 / 0.070
G30     120.3          73.0                3.4 +/-    0.76       3.6 +/-    0.76  0.180 / 0.200