PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-13:42:40
G01     222.8          14.3                6.0 +/-    5.34      15.1 +/-    5.34  0.040 / 0.040
G03     260.7          72.8                8.2 +/-    0.76       8.5 +/-    0.76  0.030 / 0.040
G14     90.1           21.1                8.4 +/-    2.13      18.0 +/-    2.13  0.250 / 0.490
G16     147.7          46.6               10.5 +/-    0.96      13.8 +/-    0.96  0.210 / 0.420
G22     197.9          64.3               10.9 +/-    1.31      12.0 +/-    1.31  0.040 / 0.040
G23     310.4          40.3                6.5 +/-    1.07       9.5 +/-    1.07  0.040 / 0.040
G26     94.6           55.5                8.5 +/-    0.82      10.1 +/-    0.82  0.130 / 0.310
G31     46.8           29.5                6.0 +/-    0.91      10.6 +/-    0.91  0.120 / 0.220