PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/27-11:12:30
G02     209.8          47.4                4.4 +/-    0.37       5.8 +/-    0.37  0.060 / 0.070
G06     105.3          79.4                5.9 +/-    0.33       6.0 +/-    0.33  0.050 / 0.070
G12     314.9          28.1                3.4 +/-    1.86       6.2 +/-    1.86  0.060 / 0.120
G17     50.2           37.1                1.7 +/-    0.56       2.5 +/-    0.56  0.060 / 0.120
G19     20.4           58.4                4.6 +/-    0.28       5.3 +/-    0.28  0.030 / 0.020
G24     275.1          43.8                3.0 +/-    1.29       4.1 +/-    1.29  0.040 / 0.020
G28     114.6          22.5                4.2 +/-    1.38       8.6 +/-    1.38  0.040 / 0.040