PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/20-19:27:50
G01     252.8          36.0               10.0 +/-    1.46      15.6 +/-    1.46  0.030 / 0.050
G03     316.1          44.0                7.5 +/-    2.72      10.3 +/-    2.72  0.040 / 0.050
G11     240.1          13.6               11.6 +/-    2.74      29.8 +/-    2.74  0.030 / 0.040
G14     58.3           42.2                9.8 +/-    0.86      13.7 +/-    0.86  0.040 / 0.050
G22     306.2          65.2                9.7 +/-    1.14      10.6 +/-    1.14  0.180 / 0.330
G23     285.7          18.8               10.2 +/-    0.85      23.0 +/-    0.85  0.120 / 0.300
G25     41.1           11.2                9.0 +/-    2.28      24.6 +/-    2.28  0.060 / 0.100
G26     138.0          36.7               14.5 +/-    0.85      22.4 +/-    0.85  0.070 / 0.110
G31     41.1           60.3                8.8 +/-    0.60       9.9 +/-    0.60  0.060 / 0.120
G32     76.3           23.6               10.1 +/-    0.99      20.3 +/-    0.99  0.060 / 0.140