PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-15:28:00
G03     213.5          60.4               10.8 +/-    1.16      12.3 +/-    1.16  0.190 / 0.340
G07     254.0          12.3                8.7 +/-    4.44      23.1 +/-    4.44  0.130 / 0.300
G09     308.2          24.5                8.1 +/-    1.08      16.0 +/-    1.08  0.030 / 0.040
G14     105.8          11.5                9.8 +/-    3.24      26.5 +/-    3.24  0.030 / 0.040
G16     103.2          63.7               11.1 +/-    0.95      12.2 +/-    0.95  0.040 / 0.030
G22     185.3          42.2               10.3 +/-    0.57      14.4 +/-    0.57  0.040 / 0.040
G23     331.7          60.4                8.5 +/-    0.86       9.6 +/-    0.86  0.050 / 0.070
G26     56.0           44.6               10.7 +/-    0.72      14.4 +/-    0.72  0.080 / 0.080
G31     57.7           11.3                7.2 +/-    1.83      19.6 +/-    1.83  0.230 / 0.240