PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/04-14:27:50
G01     251.5          35.4                9.2 +/-    1.78      14.4 +/-    1.78  0.050 / 0.080
G03     315.8          47.3                5.2 +/-    1.74       6.8 +/-    1.74  0.040 / 0.100
G11     239.5          12.7                8.7 +/-    2.55      22.9 +/-    2.55  0.120 / 0.330
G14     57.7           43.4                7.5 +/-    0.75      10.4 +/-    0.75  0.110 / 0.350
G18     222.0          28.0               10.7 +/-    1.81      19.5 +/-    1.81  0.040 / 0.080
G22     301.8          70.2                7.9 +/-    0.95       8.4 +/-    0.95  0.040 / 0.090
G25     40.5           10.8                6.2 +/-    2.08      16.9 +/-    2.08  0.110 / 0.530
G26     134.5          38.4               12.2 +/-    0.76      18.2 +/-    0.76  0.140 / 0.630
G31     41.2           56.8                7.8 +/-    0.71       9.1 +/-    0.71  0.040 / 0.050
G32     77.9           21.8                7.4 +/-    0.56      15.7 +/-    0.56  0.040 / 0.050