PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/17-17:58:10
G02     236.6          72.5               14.6 +/-    0.67      15.2 +/-    0.67  0.060 / 0.080
G05     175.4          12.7               23.1 +/-    2.69      60.7 +/-    2.69  0.060 / 0.110
G06     41.1           59.1               12.2 +/-    0.45      13.9 +/-    0.45  0.030 / 0.070
G12     321.8          52.1               12.9 +/-    0.77      15.8 +/-    0.77  0.030 / 0.060
G17     72.2           20.3               10.5 +/-    1.01      22.9 +/-    1.01  0.120 / 0.420
G19     58.5           37.2               11.0 +/-    0.96      16.7 +/-    0.96  0.170 / 0.430
G24     247.9          35.5               15.9 +/-    1.07      25.0 +/-    1.07  0.070 / 0.150
G25     316.9          16.0                9.2 +/-    3.34      22.3 +/-    3.34  0.080 / 0.160