PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-13:27:50
G01     250.8          35.1                8.9 +/-    1.68      14.2 +/-    1.68  0.120 / 0.270
G03     315.7          47.0                6.8 +/-    0.40       8.9 +/-    0.40  0.180 / 0.330
G11     238.6          12.3                5.3 +/-    2.24      14.1 +/-    2.24  0.050 / 0.060
G14     57.9           43.5                7.5 +/-    1.41      10.3 +/-    1.41  0.040 / 0.080
G18     221.4          27.5                8.2 +/-    1.74      15.2 +/-    1.74  0.040 / 0.040
G22     299.6          71.8                6.6 +/-    0.93       6.9 +/-    0.93  0.040 / 0.030
G25     40.1           10.4                6.4 +/-    4.11      17.7 +/-    4.11  0.120 / 0.230
G26     133.7          39.0                9.0 +/-    0.71      13.4 +/-    0.71  0.120 / 0.240
G31     41.2           55.9                7.2 +/-    0.47       8.5 +/-    0.47  0.050 / 0.050
G32     78.5           21.3                6.4 +/-    2.19      13.6 +/-    2.19  0.040 / 0.050