PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/06-12:27:30
G01     223.1          14.7                2.9 +/-    3.56       7.2 +/-    3.56  0.030 / 0.040
G03     266.2          72.3                4.3 +/-    0.67       4.5 +/-    0.67  0.040 / 0.050
G14     89.5           21.6                4.7 +/-    1.06      10.0 +/-    1.06  0.040 / 0.040
G16     147.0          46.5                5.6 +/-    0.77       7.3 +/-    0.77  0.040 / 0.040
G22     201.2          65.6                5.9 +/-    0.66       6.4 +/-    0.66  0.280 / 0.390
G23     310.4          40.5                3.2 +/-    1.10       4.6 +/-    1.10  0.270 / 0.420
G26     94.5           55.2                3.9 +/-    0.35       4.6 +/-    0.35  0.110 / 0.260
G31     46.7           29.4                2.2 +/-    1.09       3.9 +/-    1.09  0.120 / 0.300