PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-20:13:10
G10     249.2          25.8               10.5 +/-    1.78      20.0 +/-    1.78  0.050 / 0.040
G13     54.9           30.5                8.5 +/-    1.82      14.7 +/-    1.82  0.050 / 0.050
G15     99.6           60.0                8.4 +/-    1.50       9.5 +/-    1.50  0.150 / 0.340
G16     296.7          15.7                6.6 +/-    2.25      16.1 +/-    2.25  0.110 / 0.330
G20     267.6          49.7                9.3 +/-    3.77      11.8 +/-    3.77  0.050 / 0.130
G21     332.0          59.1                8.2 +/-    0.41       9.4 +/-    0.41  0.100 / 0.120
G26     269.2          16.2                9.0 +/-    1.95      21.7 +/-    1.95  0.030 / 0.040
G29     164.3          52.4               10.2 +/-    1.18      12.5 +/-    1.18  0.030 / 0.040