PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/25-14:58:10
G02     204.2          31.5                8.7 +/-    2.90      14.9 +/-    2.90  0.110 / 0.070
G06     153.1          70.4                8.3 +/-    1.19       8.7 +/-    1.19  0.090 / 0.080
G12     309.0          19.7                7.5 +/-    1.72      16.7 +/-    1.72  0.050 / 0.030
G17     37.5           47.8                8.2 +/-    0.51      10.6 +/-    0.51  0.040 / 0.030
G19     351.1          66.7                5.9 +/-    0.77       6.4 +/-    0.77  0.080 / 0.170
G24     296.4          39.3                8.6 +/-    1.32      12.7 +/-    1.32  0.070 / 0.160
G28     102.1          31.5                8.2 +/-    1.15      13.9 +/-    1.15  0.030 / 0.040