PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-13:27:40
G03     220.8          66.5                5.8 +/-    0.75       6.2 +/-    0.75  0.110 / 0.290
G07     250.3          13.9                5.5 +/-    1.28      14.1 +/-    1.28  0.120 / 0.250
G09     303.8          18.3                4.5 +/-    1.71      10.3 +/-    1.71  0.040 / 0.040
G14     101.0          12.7                8.2 +/-    1.80      21.6 +/-    1.80  0.040 / 0.040
G16     129.7          59.1                7.9 +/-    0.44       9.0 +/-    0.44  0.080 / 0.070
G22     189.5          50.6                8.3 +/-    2.30      10.4 +/-    2.30  0.050 / 0.070
G23     321.0          50.9                4.9 +/-    1.43       6.1 +/-    1.43  0.130 / 0.480
G26     69.3           52.4                5.3 +/-    0.22       6.5 +/-    0.22  0.120 / 0.360
G31     53.2           18.5                4.5 +/-    0.87      10.2 +/-    0.87  0.030 / 0.050