PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/31-10:12:30
G01     43.5           19.2                2.9 +/-    0.75       6.5 +/-    0.75  0.050 / 0.080
G06     178.1          32.6                6.4 +/-    1.83      10.6 +/-    1.83  0.040 / 0.090
G13     243.0          24.8                6.7 +/-    2.14      13.2 +/-    2.14  0.170 / 0.280
G15     274.9          13.8                5.1 +/-    1.19      13.0 +/-    1.19  0.200 / 0.360
G17     358.2          72.4                5.7 +/-    0.66       5.9 +/-    0.66  0.030 / 0.030
G19     269.4          68.4                5.0 +/-    0.84       5.3 +/-    0.84  0.030 / 0.030
G24     318.3          14.5                3.4 +/-    1.61       8.7 +/-    1.61  0.120 / 0.160
G28     66.9           48.3                4.3 +/-    0.44       5.5 +/-    0.44  0.080 / 0.200
G30     153.2          31.8                7.6 +/-    1.47      12.9 +/-    1.47  0.050 / 0.090