PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/16-07:57:50
G07     331.8          57.7                3.8 +/-    0.62       4.4 +/-    0.62  0.030 / 0.040
G08     98.3           51.0                5.0 +/-    0.93       6.2 +/-    0.93  0.040 / 0.040
G09     179.3          70.9                5.9 +/-    0.42       6.2 +/-    0.42  0.070 / 0.070
G11     145.6          12.9                5.0 +/-    1.64      13.0 +/-    1.64  0.070 / 0.090
G23     155.5          44.2                4.9 +/-    0.91       6.7 +/-    0.91  0.070 / 0.100
G27     57.4           33.2                3.3 +/-    1.90       5.4 +/-    1.90  0.080 / 0.110
G28     235.9          27.5                5.5 +/-    1.38      10.2 +/-    1.38  0.040 / 0.060
G30     299.9          32.8                3.8 +/-    2.55       6.3 +/-    2.55  0.040 / 0.070