PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-14:42:50
G02     212.5          54.6               10.3 +/-    1.09      12.3 +/-    1.09  0.090 / 0.080
G06     77.7           78.9                7.9 +/-    0.43       8.0 +/-    0.43  0.080 / 0.100
G12     317.1          31.7                7.8 +/-    0.82      13.2 +/-    0.82  0.050 / 0.070
G17     55.6           33.0                5.8 +/-    0.30       9.5 +/-    0.30  0.050 / 0.090
G19     36.7           50.6                6.3 +/-    0.48       7.8 +/-    0.48  0.040 / 0.070
G24     273.9          41.9                8.0 +/-    0.93      11.3 +/-    0.93  0.040 / 0.080
G28     120.1          16.3                7.6 +/-    1.44      18.3 +/-    1.44  0.020 / 0.030