PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-17:27:50
G02     228.1          68.4               11.8 +/-    0.92      12.6 +/-    0.92  0.050 / 0.060
G06     43.2           64.1               11.2 +/-    0.33      12.4 +/-    0.33  0.040 / 0.040
G12     321.4          47.1               11.8 +/-    0.48      15.4 +/-    0.48  0.280 / 0.530
G17     68.4           23.1               10.5 +/-    2.20      21.4 +/-    2.20  0.300 / 0.340
G19     53.8           40.3               11.7 +/-    1.14      16.9 +/-    1.14  0.100 / 0.070
G24     253.5          37.9               11.4 +/-    2.91      17.2 +/-    2.91  0.060 / 0.110
G25     315.9          11.7               -0.4 +/-   33.58      -1.0 +/-   33.58  0.080 / 0.110