PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-20:27:50
G01     86.6           32.6               16.0 +/-    0.54      26.6 +/-    0.54  0.150 / 0.330
G07     128.2          43.3               17.8 +/-    1.27      24.6 +/-    1.27  0.100 / 0.300
G11     66.6           39.4               14.0 +/-    0.46      20.6 +/-    0.46  0.040 / 0.090
G13     291.3          36.6               14.7 +/-    0.79      22.7 +/-    0.79  0.040 / 0.090
G15     313.2          11.3               10.9 +/-    2.51      29.5 +/-    2.51  0.030 / 0.030
G17     217.6          52.2               18.5 +/-    1.16      22.8 +/-    1.16  0.030 / 0.040
G18     61.2           23.4               11.9 +/-    1.22      24.0 +/-    1.22  0.060 / 0.130
G19     216.2          28.9               21.4 +/-    1.39      38.3 +/-    1.39  0.060 / 0.100
G28     355.9          61.5               14.9 +/-    1.06      16.7 +/-    1.06  0.040 / 0.060
G30     114.9          72.2               17.1 +/-    0.73      17.9 +/-    0.73  0.040 / 0.080