PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-17:27:50
G01     251.5          35.4                9.4 +/-    1.86      14.9 +/-    1.86  0.120 / 0.390
G03     315.8          46.9                7.2 +/-    2.24       9.5 +/-    2.24  0.140 / 0.330
G11     240.1          12.9               10.0 +/-    3.77      26.0 +/-    3.77  0.040 / 0.050
G14     58.9           42.2                8.6 +/-    0.65      12.1 +/-    0.65  0.030 / 0.040
G22     303.9          67.6                7.6 +/-    0.54       8.1 +/-    0.54  0.030 / 0.050
G23     287.1          20.5                9.6 +/-    1.96      20.8 +/-    1.96  0.040 / 0.050
G25     40.4           10.7                7.0 +/-    1.75      19.1 +/-    1.75  0.050 / 0.090
G26     135.8          38.1               11.9 +/-    0.66      17.8 +/-    0.66  0.050 / 0.080
G31     41.0           57.9                7.7 +/-    0.49       8.9 +/-    0.49  0.090 / 0.290
G32     77.6           22.3                7.6 +/-    0.67      15.9 +/-    0.67  0.110 / 0.310