PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-18:42:30
G01     224.9          15.5               11.4 +/-    4.05      28.1 +/-    4.05  0.050 / 0.120
G03     273.8          70.8               13.6 +/-    1.02      14.3 +/-    1.02  0.060 / 0.100
G14     88.0           24.1               12.6 +/-    1.66      25.1 +/-    1.66  0.040 / 0.040
G16     145.8          47.0               14.7 +/-    0.69      19.3 +/-    0.69  0.040 / 0.040
G22     207.6          68.2               11.8 +/-    0.88      12.6 +/-    0.88  0.030 / 0.070
G23     309.8          40.1               11.4 +/-    0.83      16.6 +/-    0.83  0.040 / 0.070
G26     92.4           54.4               11.7 +/-    1.19      14.0 +/-    1.19  0.110 / 0.190
G31     46.2           29.8                9.0 +/-    1.24      15.9 +/-    1.24  0.110 / 0.240