PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-19:57:40
G10     249.3          26.0               16.0 +/-    1.22      30.6 +/-    1.22  0.050 / 0.050
G13     54.7           30.4               10.1 +/-    1.83      17.6 +/-    1.83  0.040 / 0.050
G15     98.7           59.9               12.9 +/-    0.76      14.7 +/-    0.76  0.160 / 0.800
G16     296.6          15.7               11.3 +/-    1.91      27.7 +/-    1.91  0.150 / 0.680
G20     267.8          49.8               12.2 +/-    0.70      15.4 +/-    0.70  0.060 / 0.150
G21     332.4          59.3               11.6 +/-    0.61      13.2 +/-    0.61  0.070 / 0.140
G26     269.1          16.1               13.9 +/-    1.86      33.6 +/-    1.86  0.030 / 0.050
G29     164.3          52.1               13.6 +/-    1.09      16.7 +/-    1.09  0.030 / 0.050