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               13.8 +/-    0.66      22.9 +/-    0.66  0.050 / 0.090
G07     128.2          43.3               17.7 +/-    0.49      24.4 +/-    0.49  0.070 / 0.100
G11     66.0           39.0               14.8 +/-    1.58      21.9 +/-    1.58  0.030 / 0.030
G13     291.1          36.7               14.3 +/-    2.25      22.0 +/-    2.25  0.030 / 0.020
G15     313.6          10.9                0.9 +/-   26.62       2.5 +/-   26.62  0.030 / 0.040
G17     217.5          53.5               17.0 +/-    1.28      20.6 +/-    1.28  0.050 / 0.030
G18     61.0           23.4               12.6 +/-    1.12      25.5 +/-    1.12  0.090 / 0.140
G19     216.2          28.5               16.5 +/-    1.83      29.9 +/-    1.83  0.090 / 0.110
G28     355.6          61.5               13.5 +/-    0.54      15.1 +/-    0.54  0.060 / 0.090
G30     114.2          73.0               17.3 +/-    0.58      18.0 +/-    0.58  0.050 / 0.080