PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-22:12:30
G10     247.7          24.4               13.7 +/-    1.67      27.0 +/-    1.67  0.060 / 0.070
G13     56.7           31.5               11.6 +/-    0.63      19.8 +/-    0.63  0.050 / 0.070
G15     100.3          59.2               13.0 +/-    0.51      14.9 +/-    0.51  0.140 / 0.730
G16     297.4          16.2                9.9 +/-    4.19      24.0 +/-    4.19  0.160 / 0.540
G20     251.4          16.4                6.7 +/-    1.63      16.1 +/-    1.63  0.050 / 0.170
G21     328.2          57.0               10.9 +/-    0.67      12.7 +/-    0.67  0.050 / 0.150
G26     269.5          17.1               13.8 +/-    2.25      32.6 +/-    2.25  0.030 / 0.040
G29     164.2          55.2               14.3 +/-    0.88      17.0 +/-    0.88  0.030 / 0.050