PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/17-16:58:00
G03     190.0          21.9               11.9 +/-    1.73      25.0 +/-    1.73  0.100 / 0.070
G07     287.3          35.4               13.2 +/-    1.27      20.8 +/-    1.27  0.120 / 0.060
G08     147.3          24.2               13.9 +/-    1.74      27.7 +/-    1.74  0.030 / 0.040
G09     320.5          59.4               12.0 +/-    1.21      13.7 +/-    1.21  0.020 / 0.030
G16     43.4           40.2                8.3 +/-    1.06      12.0 +/-    1.06  0.040 / 0.090
G23     111.9          77.1               11.0 +/-    0.51      11.3 +/-    0.51  0.060 / 0.090
G26     43.2           12.2                7.5 +/-    2.00      20.0 +/-    2.00  0.070 / 0.100
G27     102.0          32.6               12.2 +/-    0.80      20.3 +/-    0.80  0.070 / 0.050
G30     272.3          12.5               10.2 +/-   24.16      27.0 +/-   24.16  0.550 / 0.230