PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-14:58:00
G07     316.8          51.1               11.7 +/-    0.94      14.6 +/-    0.94  0.040 / 0.050
G08     119.7          46.7               12.6 +/-    0.59      16.6 +/-    0.59  0.040 / 0.040
G09     239.7          83.0               10.7 +/-    0.28      10.8 +/-    0.28  0.030 / 0.050
G16     43.7           14.8                9.3 +/-    3.01      23.3 +/-    3.01  0.050 / 0.050
G23     149.3          50.3               12.9 +/-    0.54      16.2 +/-    0.54  0.090 / 0.140
G27     67.6           36.1                9.5 +/-    1.14      14.8 +/-    1.14  0.150 / 0.120
G28     229.2          20.2               13.3 +/-    1.83      29.1 +/-    1.83  0.050 / 0.050
G30     293.0          27.9                9.5 +/-    1.43      17.4 +/-    1.43  0.030 / 0.050