PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/07-18:27:30
G02     227.1          66.9               13.6 +/-    1.21      14.6 +/-    1.21  0.040 / 0.040
G06     43.6           64.3                1.2 +/-   20.16       1.4 +/-   20.16  0.040 / 0.040
G12     321.5          47.0               14.4 +/-    5.04      18.8 +/-    5.04  0.230 / 0.280
G17     67.9           23.5               14.6 +/-    9.05      29.5 +/-    9.05  0.150 / 0.330
G19     53.2           40.6               -8.5 +/-   47.20     -12.2 +/-   47.20  0.070 / 0.070
G24     254.2          38.2                5.8 +/-   13.24       8.7 +/-   13.24  0.060 / 0.060
G25     315.8          11.8                2.8 +/-   33.59       7.6 +/-   33.59  0.040 / 0.050