PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-17:42:40
G07     332.5          57.7               10.5 +/-    0.75      12.2 +/-    0.75  0.040 / 0.050
G08     104.3          52.7               13.9 +/-    0.53      17.0 +/-    0.53  0.030 / 0.070
G09     192.7          73.8               12.9 +/-    0.88      13.4 +/-    0.88  0.080 / 0.450
G11     146.8          12.9               13.7 +/-    2.02      35.8 +/-    2.02  0.080 / 0.520
G23     154.0          36.5               13.1 +/-    1.50      20.3 +/-    1.50  0.060 / 0.090
G27     54.4           31.2               11.4 +/-    0.96      19.5 +/-    0.96  0.060 / 0.100
G28     237.7          30.1               13.1 +/-    0.79      22.8 +/-    0.79  0.070 / 0.090
G30     303.1          36.5               11.7 +/-    1.06      18.0 +/-    1.06  0.070 / 0.120