PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-13:57:50
G02     205.8          41.4                8.4 +/-    1.06      12.0 +/-    1.06  0.180 / 0.170
G06     148.5          75.6                9.5 +/-    1.60       9.8 +/-    1.60  0.080 / 0.170
G12     311.5          20.6                6.4 +/-    3.51      13.9 +/-    3.51  0.050 / 0.080
G17     44.8           41.8                6.4 +/-    0.95       9.1 +/-    0.95  0.050 / 0.080
G19     19.2           59.4                6.7 +/-    0.51       7.6 +/-    0.51  0.040 / 0.030
G24     291.3          40.1                4.7 +/-    1.73       6.8 +/-    1.73  0.050 / 0.040
G28     109.8          25.7                8.0 +/-    2.49      15.4 +/-    2.49  0.030 / 0.060