PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/11-20:58:00
G01     105.0          26.7               11.8 +/-    1.96      22.3 +/-    1.96  0.210 / 0.140
G07     109.7          57.2               13.5 +/-    0.27      15.7 +/-    0.27  0.110 / 0.190
G08     42.3           22.5                8.2 +/-    2.57      17.0 +/-    2.57  0.070 / 0.120
G09     175.0          12.5               16.1 +/-    2.39      42.4 +/-    2.39  0.080 / 0.130
G11     88.6           43.4               12.1 +/-    1.74      16.6 +/-    1.74  0.030 / 0.030
G13     308.3          29.5               11.2 +/-    1.19      19.8 +/-    1.19  0.030 / 0.030
G17     207.9          35.6               14.0 +/-    1.17      22.0 +/-    1.17  0.030 / 0.040
G18     78.7           24.6               10.9 +/-    2.09      21.4 +/-    2.09  0.030 / 0.040
G28     323.0          61.4               11.3 +/-    0.85      12.7 +/-    0.85  0.070 / 0.150
G30     45.6           78.8               13.8 +/-    0.93      14.0 +/-    0.93  0.080 / 0.160