PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-17:57:30
G02     205.4          38.2               14.8 +/-    1.11      22.2 +/-    1.11  0.090 / 0.090
G06     142.8          74.8               13.9 +/-    0.86      14.3 +/-    0.86  0.100 / 0.080
G12     311.1          22.0               12.7 +/-    1.53      26.5 +/-    1.53  0.030 / 0.020
G17     40.3           45.8               12.6 +/-    1.09      16.8 +/-    1.09  0.030 / 0.030
G19     4.9            63.7               13.3 +/-    0.57      14.7 +/-    0.57  0.090 / 0.170
G24     291.0          40.9               10.6 +/-    5.78      15.3 +/-    5.78  0.070 / 0.110
G28     107.0          28.0               13.3 +/-    1.04      24.4 +/-    1.04  0.030 / 0.040