PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-18:57:40
G01     86.6           32.6               15.9 +/-    0.79      26.5 +/-    0.79  0.040 / 0.060
G07     128.2          43.3               18.1 +/-    1.02      25.0 +/-    1.02  0.030 / 0.070
G11     66.0           39.0               14.5 +/-    0.37      21.5 +/-    0.37  0.140 / 0.340
G13     291.1          36.7               14.7 +/-    0.65      22.6 +/-    0.65  0.130 / 0.380
G15     313.6          10.9                6.3 +/-   23.34      17.1 +/-   23.34  0.050 / 0.050
G17     217.5          53.5               17.6 +/-    1.57      21.3 +/-    1.57  0.040 / 0.060
G18     61.0           23.4               12.8 +/-    1.06      26.0 +/-    1.06  0.050 / 0.090
G19     216.2          28.5               15.9 +/-    1.47      28.7 +/-    1.47  0.040 / 0.090
G28     355.6          61.5               14.7 +/-    0.70      16.5 +/-    0.70  0.030 / 0.030
G30     114.2          73.0               17.0 +/-    0.94      17.7 +/-    0.94  0.030 / 0.030