PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-07:27:50
G07     331.1          57.4                4.0 +/-    0.52       4.7 +/-    0.52  0.090 / 0.120
G08     99.2           50.9                7.3 +/-    0.60       9.1 +/-    0.60  0.090 / 0.120
G09     178.7          71.2                7.6 +/-    0.62       7.9 +/-    0.62  0.030 / 0.050
G11     145.9          12.5                5.7 +/-    3.37      15.0 +/-    3.37  0.030 / 0.050
G23     155.4          45.0                7.5 +/-    0.95      10.1 +/-    0.95  0.050 / 0.070
G27     58.1           33.6                4.4 +/-    0.59       7.1 +/-    0.59  0.050 / 0.070
G28     235.4          27.0                4.9 +/-    1.66       9.2 +/-    1.66  0.040 / 0.080
G30     299.4          32.4                2.7 +/-    1.58       4.6 +/-    1.58  0.040 / 0.070