PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-20:27:30
G10     248.3          25.0               11.7 +/-    1.71      22.8 +/-    1.71  0.050 / 0.050
G13     55.9           31.1                8.9 +/-    2.19      15.2 +/-    2.19  0.050 / 0.050
G15     102.5          59.9                9.5 +/-    1.38      10.8 +/-    1.38  0.140 / 0.350
G16     297.7          15.7                6.5 +/-    1.83      15.8 +/-    1.83  0.160 / 0.400
G20     266.2          49.0               10.3 +/-    3.84      13.2 +/-    3.84  0.050 / 0.130
G21     330.6          58.3                9.8 +/-    0.44      11.3 +/-    0.44  0.060 / 0.140
G26     270.1          16.6               10.1 +/-    1.86      24.2 +/-    1.86  0.030 / 0.040
G29     164.0          53.6               10.4 +/-    0.67      12.6 +/-    0.67  0.030 / 0.030