PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-14:57:50
G03     187.4          13.5                9.8 +/-    3.71      25.3 +/-    3.71  0.130 / 0.230
G07     298.0          41.5               10.0 +/-    2.30      14.2 +/-    2.30  0.080 / 0.210
G08     137.8          33.9               12.6 +/-    0.68      20.5 +/-    0.68  0.070 / 0.090
G09     316.9          71.1                9.0 +/-    0.97       9.5 +/-    0.97  0.050 / 0.110
G16     41.7           29.7                6.1 +/-    0.71      10.7 +/-    0.71  0.050 / 0.090
G23     134.9          67.4               10.0 +/-    0.63      10.8 +/-    0.63  0.050 / 0.080
G27     89.3           36.3                9.2 +/-    0.71      14.2 +/-    0.71  0.050 / 0.150
G30     280.0          17.8               10.7 +/-    1.31      24.8 +/-    1.31  0.060 / 0.170