PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/07-16:57:40
G07     44.3           67.8               10.6 +/-    0.38      11.4 +/-    0.38  0.050 / 0.100
G08     58.8           45.8                9.5 +/-    0.42      12.6 +/-    0.42  0.050 / 0.110
G09     180.2          47.3               14.0 +/-    1.79      18.3 +/-    1.79  0.060 / 0.160
G11     126.0          30.7               12.0 +/-    1.13      20.8 +/-    1.13  0.060 / 0.150
G18     109.8          12.1               11.3 +/-    2.00      30.0 +/-    2.00  0.030 / 0.040
G23     160.1          15.6               10.7 +/-    3.41      26.3 +/-    3.41  0.030 / 0.040
G27     39.7           15.7                8.8 +/-    0.83      21.5 +/-    0.83  0.110 / 0.300
G28     259.5          43.6               12.1 +/-    2.22      16.7 +/-    2.22  0.110 / 0.280
G30     325.7          55.4               10.7 +/-    0.72      12.7 +/-    0.72  0.130 / 0.200