PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-01:57:40
G02     46.1           43.9               10.6 +/-    0.95      14.5 +/-    0.95  0.040 / 0.050
G05     97.9           68.8               11.1 +/-    0.86      11.8 +/-    0.86  0.050 / 0.040
G12     188.9          51.6               13.1 +/-    0.88      16.2 +/-    0.88  0.030 / 0.030
G25     271.6          58.1               10.4 +/-    0.91      12.0 +/-    0.91  0.030 / 0.020
G29     316.6          38.3               10.6 +/-    1.00      15.9 +/-    1.00  0.050 / 0.050