PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-12:27:50
G01     254.7          37.7                6.8 +/-    2.05      10.2 +/-    2.05  0.090 / 0.110
G03     316.8          45.5                5.0 +/-    1.65       6.7 +/-    1.65  0.080 / 0.130
G11     239.5          13.5                3.0 +/-    2.18       7.7 +/-    2.18  0.090 / 0.090
G14     56.5           42.6                6.2 +/-    1.81       8.7 +/-    1.81  0.080 / 0.100
G18     221.2          29.7                5.6 +/-    2.51       9.9 +/-    2.51  0.060 / 0.120
G22     306.5          67.9                5.4 +/-    1.01       5.8 +/-    1.01  0.070 / 0.110
G25     42.3           11.4                3.6 +/-    2.04       9.6 +/-    2.04  0.050 / 0.080
G26     142.8          33.7                5.5 +/-    0.91       9.0 +/-    0.91  0.070 / 0.080
G31     42.9           63.3                2.7 +/-    0.82       2.9 +/-    0.82  0.050 / 0.040
G32     70.8           30.2                5.2 +/-    2.43       9.1 +/-    2.43  0.040 / 0.030