PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-19:42:30
G02     233.7          69.9               15.7 +/-    0.56      16.7 +/-    0.56  0.030 / 0.030
G05     174.7          12.7               22.5 +/-    2.58      59.1 +/-    2.58  0.030 / 0.040
G06     41.5           59.5               14.7 +/-    0.43      16.8 +/-    0.43  0.040 / 0.050
G12     322.1          52.0               13.8 +/-    1.37      17.0 +/-    1.37  0.030 / 0.050
G17     71.4           20.9               12.5 +/-    0.89      26.8 +/-    0.89  0.110 / 0.300
G19     57.6           37.8               12.8 +/-    1.15      19.2 +/-    1.15  0.150 / 0.380
G25     316.7          15.1               11.9 +/-    3.26      29.6 +/-    3.26  0.220 / 0.350