PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-12:42:50
G03     237.0          68.4                6.9 +/-    0.67       7.4 +/-    0.67  0.090 / 0.260
G14     97.7           18.7                6.7 +/-    2.12      15.2 +/-    2.12  0.100 / 0.230
G16     124.0          59.0                9.1 +/-    0.71      10.4 +/-    0.71  0.060 / 0.040
G22     190.5          53.4                7.3 +/-    0.74       8.9 +/-    0.74  0.050 / 0.050
G23     322.2          52.1                5.5 +/-    0.67       6.8 +/-    0.67  0.050 / 0.050
G26     67.7           50.4                6.7 +/-    0.91       8.4 +/-    0.91  0.050 / 0.060
G31     52.6           18.0                5.5 +/-    3.84      12.7 +/-    3.84  0.030 / 0.050