PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-14:57:50
G07     316.8          51.1               11.4 +/-    1.61      14.2 +/-    1.61  0.040 / 0.060
G08     119.7          46.7               13.7 +/-    1.25      18.1 +/-    1.25  0.040 / 0.060
G09     239.7          83.0               11.4 +/-    0.53      11.5 +/-    0.53  0.030 / 0.050
G16     43.7           14.8                9.0 +/-    1.45      22.6 +/-    1.45  0.040 / 0.060
G23     149.3          50.3               12.8 +/-    0.91      16.0 +/-    0.91  0.060 / 0.150
G27     67.6           36.1               10.4 +/-    0.67      16.1 +/-    0.67  0.060 / 0.130
G28     229.2          20.2               13.8 +/-    1.53      30.3 +/-    1.53  0.120 / 0.240
G30     293.0          27.9                8.9 +/-    1.98      16.4 +/-    1.98  0.090 / 0.230