PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-09:57:40
G01     309.4          32.3                6.2 +/-    1.42      10.3 +/-    1.42  0.080 / 0.110
G10     103.2          40.7                7.2 +/-    0.95      10.3 +/-    0.95  0.100 / 0.130
G11     284.0          27.9                6.1 +/-    1.57      11.2 +/-    1.57  0.080 / 0.140
G14     352.0          68.2                5.4 +/-    0.55       5.8 +/-    0.55  0.090 / 0.150
G18     279.3          50.5                8.4 +/-    0.84      10.5 +/-    0.84  0.040 / 0.050
G20     118.9          16.0                4.0 +/-    1.54       9.8 +/-    1.54  0.040 / 0.050
G22     309.9          27.3                3.5 +/-    1.98       6.4 +/-    1.98  0.040 / 0.050
G25     84.6           15.3                3.8 +/-    0.83       9.3 +/-    0.83  0.040 / 0.050
G31     169.2          61.4                8.1 +/-    0.75       9.0 +/-    0.75  0.060 / 0.170
G32     27.0           58.0                5.7 +/-    0.80       6.6 +/-    0.80  0.060 / 0.200