PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-19:27:40
G02     238.8          72.4               10.0 +/-    0.45      10.5 +/-    0.45  0.030 / 0.040
G05     174.0          14.7               13.1 +/-    1.12      32.7 +/-    1.12  0.040 / 0.030
G06     40.8           57.1               10.0 +/-    0.47      11.6 +/-    0.47  0.410 / 0.200
G12     322.0          54.3                9.4 +/-    0.73      11.3 +/-    0.73  0.110 / 0.150
G17     73.4           19.4                9.5 +/-    1.74      21.3 +/-    1.74  0.110 / 0.100
G19     60.0           36.3                8.9 +/-    0.45      13.8 +/-    0.45  0.090 / 0.090
G24     246.4          34.8               12.5 +/-    2.20      19.9 +/-    2.20  0.030 / 0.040
G25     317.1          17.5               10.0 +/-    3.21      23.5 +/-    3.21  0.060 / 0.040