PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/14-01:57:50
G02     47.6           42.6                8.4 +/-    1.00      11.7 +/-    1.00  0.050 / 0.050
G05     92.1           68.7                9.2 +/-    0.67       9.8 +/-    0.67  0.040 / 0.050
G12     188.2          49.5               11.6 +/-    0.96      14.7 +/-    0.96  0.030 / 0.030
G25     267.7          58.1               10.6 +/-    1.02      12.2 +/-    1.02  0.020 / 0.030
G29     317.8          39.8                7.9 +/-    0.67      11.5 +/-    0.67  0.040 / 0.050