PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-15:27:50
G03     213.5          60.4                9.0 +/-    1.56      10.2 +/-    1.56  0.110 / 0.540
G07     254.0          12.3                6.5 +/-    2.95      17.1 +/-    2.95  0.080 / 0.500
G09     308.2          24.5                8.1 +/-    1.27      16.1 +/-    1.27  0.030 / 0.070
G14     105.8          11.5                7.5 +/-    2.78      20.3 +/-    2.78  0.030 / 0.060
G16     103.2          63.7                9.3 +/-    0.57      10.2 +/-    0.57  0.040 / 0.050
G22     185.3          42.2               10.0 +/-    3.00      14.1 +/-    3.00  0.050 / 0.040
G23     331.7          60.4                8.4 +/-    1.15       9.6 +/-    1.15  0.050 / 0.070
G26     56.0           44.6                8.6 +/-    0.93      11.6 +/-    0.93  0.180 / 0.240
G31     57.7           11.3                7.4 +/-    2.50      20.1 +/-    2.50  0.120 / 0.280