PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-13:42:50
G01     221.6          13.0                6.1 +/-    2.17      16.0 +/-    2.17  0.050 / 0.110
G14     91.6           20.0                8.3 +/-    1.33      18.4 +/-    1.33  0.050 / 0.110
G16     145.9          48.5                9.7 +/-    0.97      12.4 +/-    0.97  0.140 / 0.430
G22     196.1          62.4                8.7 +/-    0.89       9.7 +/-    0.89  0.160 / 0.400
G23     311.8          41.7                7.1 +/-    1.46      10.0 +/-    1.46  0.040 / 0.040
G26     90.9           55.6                7.7 +/-    0.64       9.1 +/-    0.64  0.030 / 0.050
G31     47.5           27.9                5.3 +/-    0.55       9.8 +/-    0.55  0.090 / 0.210