PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-19:42:30
G02     246.5          74.8               16.1 +/-    0.43      16.6 +/-    0.43  0.030 / 0.030
G05     172.7          17.4               17.5 +/-    3.87      41.0 +/-    3.87  0.030 / 0.030
G06     40.4           54.0               14.5 +/-    0.66      17.4 +/-    0.66  0.030 / 0.040
G12     321.7          57.6               14.8 +/-    0.75      17.1 +/-    0.75  0.030 / 0.040
G17     75.9           17.6               12.1 +/-    2.04      28.1 +/-    2.04  0.350 / 0.230
G19     63.0           34.4               13.8 +/-    1.78      22.1 +/-    1.78  0.140 / 0.290
G24     243.1          33.0               18.3 +/-    2.21      30.2 +/-    2.21  0.090 / 0.090
G25     317.5          20.1               13.7 +/-    1.77      30.1 +/-    1.77  0.080 / 0.090