PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/09-16:27:30
G07     316.7          51.0               10.9 +/-    1.06      13.5 +/-    1.06  0.040 / 0.050
G08     121.3          46.6               13.4 +/-    0.71      17.7 +/-    0.71  0.040 / 0.060
G09     245.1          82.9               10.9 +/-    1.00      11.0 +/-    1.00  0.030 / 0.070
G16     43.7           15.1                8.9 +/-    2.89      22.0 +/-    2.89  0.030 / 0.050
G23     148.9          49.0               12.2 +/-    0.59      15.6 +/-    0.59  0.030 / 0.050
G27     67.4           36.0               10.0 +/-    1.14      15.7 +/-    1.14  0.040 / 0.050
G28     229.2          20.3               12.3 +/-    2.63      26.9 +/-    2.63  0.150 / 0.380
G30     293.3          28.4                8.5 +/-    0.83      15.4 +/-    0.83  0.180 / 0.220