PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/20-10:58:00
G01     43.4           19.2                3.9 +/-    0.92       8.7 +/-    0.92  0.050 / 0.110
G06     177.7          33.0                8.1 +/-    2.91      13.4 +/-    2.91  0.080 / 0.090
G13     243.1          24.8                8.2 +/-    3.21      16.1 +/-    3.21  0.080 / 0.250
G15     275.1          13.8                5.6 +/-    1.13      14.4 +/-    1.13  0.070 / 0.190
G17     358.8          72.3                6.4 +/-    0.83       6.7 +/-    0.83  0.120 / 0.240
G19     269.6          68.5                6.3 +/-    0.79       6.7 +/-    0.79  0.100 / 0.230
G24     318.3          14.5                3.5 +/-    1.53       8.7 +/-    1.53  0.030 / 0.030
G28     66.9           48.4                5.8 +/-    0.48       7.5 +/-    0.48  0.040 / 0.030
G30     153.3          32.1                8.5 +/-    1.07      14.2 +/-    1.07  0.070 / 0.100