PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-22:57:40
G02     215.3          60.3               13.6 +/-    0.81      15.5 +/-    0.81  0.090 / 0.090
G06     58.6           74.3               12.0 +/-    0.41      12.4 +/-    0.41  0.040 / 0.080
G12     318.5          36.0               11.3 +/-    1.58      17.7 +/-    1.58  0.070 / 0.070
G17     54.9           35.5               11.0 +/-    1.63      17.2 +/-    1.63  0.050 / 0.080
G19     37.1           50.7               11.2 +/-    1.71      14.0 +/-    1.71  0.030 / 0.020
G24     266.0          41.8               12.8 +/-    2.30      18.1 +/-    2.30  0.030 / 0.020
G28     122.3          13.9               13.6 +/-    1.71      34.6 +/-    1.71  0.140 / 0.340