PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/20-17:27:50
G01     314.8          25.5                7.4 +/-    2.12      14.2 +/-    2.12  0.120 / 0.180
G10     93.2           47.9               25.2 +/-    1.07      32.6 +/-    1.07  0.170 / 0.150
G11     295.5          25.7                7.5 +/-    1.30      14.4 +/-    1.30  0.160 / 0.230
G14     325.7          70.5                8.5 +/-    0.43       9.0 +/-    0.43  0.180 / 0.250
G18     110.4          20.2               11.2 +/-    1.31      24.5 +/-    1.31  0.080 / 0.160
G22     305.3          17.8                7.9 +/-    3.04      18.3 +/-    3.04  0.120 / 0.160
G25     93.0           12.8               14.5 +/-    3.10      38.1 +/-    3.10  0.030 / 0.040
G31     173.6          52.7               11.7 +/-    0.46      14.3 +/-    0.46  0.040 / 0.040
G32     23.2           60.3                9.0 +/-    0.60      10.2 +/-    0.60  0.040 / 0.030