PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-13:28:00
G03     212.2          58.2                9.6 +/-    1.08      11.1 +/-    1.08  0.070 / 0.300
G07     256.3          14.3                6.9 +/-    1.95      17.4 +/-    1.95  0.070 / 0.290
G09     310.0          27.5                6.7 +/-    1.20      12.3 +/-    1.20  0.180 / 0.280
G14     107.8          10.6                7.7 +/-    2.99      21.3 +/-    2.99  0.180 / 0.410
G16     93.6           63.8                8.5 +/-    1.04       9.3 +/-    1.04  0.030 / 0.040
G22     185.2          39.6                9.7 +/-    1.09      14.2 +/-    1.09  0.040 / 0.040
G23     334.9          62.9                8.2 +/-    0.70       9.1 +/-    0.70  0.040 / 0.080
G26     53.1           42.1                7.4 +/-    1.43      10.3 +/-    1.43  0.040 / 0.070
G27     134.5          10.2               -4.5 +/-   31.99     -12.4 +/-   31.99  0.030 / 0.030