PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/23-15:42:40
G03     243.9          71.2                9.1 +/-    0.39       9.5 +/-    0.39  0.100 / 0.260
G09     299.7          13.4                3.8 +/-   18.19       9.8 +/-   18.19  0.120 / 0.270
G14     95.2           17.2                8.1 +/-    2.27      19.1 +/-    2.27  0.130 / 0.280
G16     143.8          51.9               10.5 +/-    0.82      12.9 +/-    0.82  0.110 / 0.210
G22     194.0          58.6                9.9 +/-    0.51      11.4 +/-    0.51  0.040 / 0.040
G23     314.4          44.1                7.9 +/-    0.68      10.8 +/-    0.68  0.040 / 0.040
G26     84.6           55.9                7.8 +/-    0.55       9.2 +/-    0.55  0.040 / 0.050
G31     49.1           25.5                7.1 +/-    2.06      13.8 +/-    2.06  0.030 / 0.040