PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/27-12:57:50
G02     228.9          71.5                5.1 +/-    0.86       5.4 +/-    0.86  0.080 / 0.210
G05     175.6          10.1               -8.9 +/-   11.85     -24.7 +/-   11.85  0.100 / 0.240
G06     43.1           66.9                4.3 +/-    0.40       4.6 +/-    0.40  0.030 / 0.060
G12     321.0          45.5                3.8 +/-    0.90       5.1 +/-    0.90  0.030 / 0.070
G17     67.9           23.7                4.3 +/-    0.71       8.7 +/-    0.71  0.060 / 0.110
G19     53.4           40.6                4.7 +/-    0.52       6.7 +/-    0.52  0.050 / 0.090
G24     253.3          37.8                5.5 +/-    0.59       8.3 +/-    0.59  0.020 / 0.020