PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/14-18:57:50
G01     224.1          14.7               10.8 +/-    5.42      27.0 +/-    5.42  0.030 / 0.030
G03     270.1          71.0                9.1 +/-    0.81       9.6 +/-    0.81  0.030 / 0.030
G14     89.1           23.3                9.3 +/-    1.57      19.0 +/-    1.57  0.040 / 0.060
G16     144.8          48.2               11.2 +/-    0.75      14.4 +/-    0.75  0.040 / 0.050
G22     205.9          67.2                9.7 +/-    0.40      10.4 +/-    0.40  0.130 / 0.190
G23     310.7          40.8                8.5 +/-    1.08      12.2 +/-    1.08  0.100 / 0.210
G26     90.3           54.4                9.7 +/-    0.91      11.7 +/-    0.91  0.300 / 0.540
G31     46.7           28.9                7.1 +/-    1.07      12.7 +/-    1.07  0.340 / 0.420