PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/15-16:27:40
G03     229.2          68.2               12.4 +/-    0.45      13.2 +/-    0.45  0.090 / 0.270
G07     248.5          11.1               -1.9 +/-   20.02      -5.1 +/-   20.02  0.100 / 0.200
G09     303.0          17.4               10.6 +/-    2.60      24.8 +/-    2.60  0.030 / 0.040
G14     99.7           13.7               10.1 +/-    2.86      25.8 +/-    2.86  0.030 / 0.040
G16     137.7          56.8               13.9 +/-    0.59      16.3 +/-    0.59  0.130 / 0.440
G22     191.2          53.1               13.0 +/-    1.13      15.8 +/-    1.13  0.140 / 0.430
G23     318.4          48.1               10.8 +/-    0.42      13.9 +/-    0.42  0.030 / 0.030
G26     74.9           54.7               12.2 +/-    0.64      14.5 +/-    0.64  0.030 / 0.030
G31     51.7           21.5                9.3 +/-    1.89      19.7 +/-    1.89  0.050 / 0.050