PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-17:42:30
G02     227.2          67.6               16.9 +/-    0.70      18.1 +/-    0.70  0.200 / 0.390
G06     43.6           64.6               14.7 +/-    0.25      16.1 +/-    0.25  0.160 / 0.400
G12     321.4          46.6               12.9 +/-    0.74      17.0 +/-    0.74  0.050 / 0.100
G17     67.9           23.5               12.8 +/-    0.75      25.9 +/-    0.75  0.050 / 0.110
G19     53.2           40.6               15.0 +/-    0.86      21.5 +/-    0.86  0.040 / 0.070
G24     254.2          38.1               15.4 +/-    0.76      23.1 +/-    0.76  0.030 / 0.060
G25     315.8          11.3               -1.0 +/-   42.71      -2.7 +/-   42.71  0.070 / 0.130