PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/07-18:42:40
G02     239.3          73.1               13.7 +/-    0.71      14.3 +/-    0.71  0.030 / 0.040
G05     174.4          14.3               16.3 +/-    2.99      41.4 +/-    2.99  0.030 / 0.060
G06     40.8           57.4               12.3 +/-    0.59      14.3 +/-    0.59  0.170 / 0.190
G12     321.9          53.9               12.5 +/-    0.86      15.1 +/-    0.86  0.140 / 0.190
G17     73.4           19.4               10.9 +/-    1.93      24.3 +/-    1.93  0.090 / 0.090
G19     59.9           36.3               11.1 +/-    0.42      17.2 +/-    0.42  0.070 / 0.070
G24     246.4          34.8               13.0 +/-    2.96      20.8 +/-    2.96  0.040 / 0.060
G25     317.1          17.7               13.2 +/-    3.16      30.9 +/-    3.16  0.030 / 0.040