PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-20:27:50
G01     46.6           22.7               11.2 +/-    0.82      23.1 +/-    0.82  0.090 / 0.220
G06     176.2          30.4               19.3 +/-    2.40      33.6 +/-    2.40  0.080 / 0.220
G11     44.0           12.1               10.4 +/-    2.46      27.8 +/-    2.46  0.080 / 0.100
G13     246.1          27.8               18.5 +/-    2.03      33.9 +/-    2.03  0.060 / 0.120
G15     279.8          14.7               14.3 +/-    1.23      35.8 +/-    1.23  0.040 / 0.060
G17     320.6          76.9               15.1 +/-    0.78      15.5 +/-    0.78  0.040 / 0.070
G19     253.7          62.0               16.6 +/-    0.83      18.5 +/-    0.83  0.180 / 0.350
G24     318.6          12.1               -4.8 +/-   35.60     -12.9 +/-   35.60  0.210 / 0.310
G28     59.5           50.9               14.5 +/-    0.35      18.2 +/-    0.35  0.200 / 0.420
G30     151.5          35.9               16.5 +/-    1.26      25.8 +/-    1.26  0.200 / 0.500