PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/14-18:12:30
G07     318.2          51.7               10.9 +/-    0.82      13.5 +/-    0.82  0.050 / 0.020
G08     121.8          47.2               13.2 +/-    0.51      17.2 +/-    0.51  0.050 / 0.020
G09     238.7          82.5               12.6 +/-    0.48      12.7 +/-    0.48  0.050 / 0.060
G16     44.0           14.6                7.4 +/-    3.46      18.5 +/-    3.46  0.040 / 0.060
G23     149.8          48.4               12.6 +/-    0.47      16.3 +/-    0.47  0.070 / 0.050
G27     65.7           35.6               10.2 +/-    1.81      16.0 +/-    1.81  0.110 / 0.070
G28     230.0          21.5               12.6 +/-    3.01      26.8 +/-    3.01  0.030 / 0.020
G30     294.7          30.0               10.4 +/-    1.75      18.2 +/-    1.75  0.040 / 0.020