PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/07-18:13:10
G02     203.0          30.8               14.1 +/-    1.45      24.3 +/-    1.45  0.260 / 0.300
G06     159.1          67.5               10.9 +/-    0.38      11.7 +/-    0.38  0.160 / 0.260
G12     307.0          15.8                7.1 +/-    1.60      17.3 +/-    1.60  0.030 / 0.030
G17     33.0           51.6                9.9 +/-    1.31      12.2 +/-    1.31  0.030 / 0.030
G19     348.0          67.5               10.4 +/-    0.42      11.1 +/-    0.42  0.100 / 0.070
G24     299.8          37.5               10.0 +/-    1.40      15.2 +/-    1.40  0.100 / 0.090
G28     99.9           32.9               10.5 +/-    1.43      17.3 +/-    1.43  0.030 / 0.030