PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/28-16:58:10
G02     225.3          66.8               11.4 +/-    1.10      12.3 +/-    1.10  0.050 / 0.080
G06     44.6           66.3                9.4 +/-    0.35      10.2 +/-    0.35  0.060 / 0.090
G12     321.1          44.9                8.2 +/-    1.53      11.0 +/-    1.53  0.040 / 0.060
G17     66.7           24.4                8.9 +/-    0.66      17.5 +/-    0.66  0.040 / 0.060
G19     51.7           41.6                8.5 +/-    1.04      12.1 +/-    1.04  0.070 / 0.150
G24     255.9          38.7               11.5 +/-    0.91      17.1 +/-    0.91  0.060 / 0.120