PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/19-11:57:40
G02     213.2          52.7                7.7 +/-    1.04       9.4 +/-    1.04  0.040 / 0.050
G06     73.4           77.6                6.0 +/-    0.81       6.1 +/-    0.81  0.040 / 0.070
G12     317.3          33.3                3.5 +/-    1.16       5.8 +/-    1.16  0.040 / 0.070
G17     54.7           33.5                2.6 +/-    0.81       4.2 +/-    0.81  0.090 / 0.090
G19     28.3           55.0                4.0 +/-    0.96       4.8 +/-    0.96  0.030 / 0.020
G24     267.4          43.3                5.0 +/-    1.00       6.8 +/-    1.00  0.030 / 0.030
G28     118.9          18.4                6.4 +/-    1.52      14.7 +/-    1.52  0.030 / 0.040