PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/06-18:27:30
G02     224.6          65.1               20.4 +/-    1.96      22.2 +/-    1.96  0.070 / 0.130
G06     44.9           66.1              -30.3 +/-   12.44     -32.8 +/-   12.44  0.070 / 0.130
G12     321.2          45.3               35.9 +/-    8.69      48.2 +/-    8.69  0.170 / 0.380
G17     66.4           24.6               11.7 +/-    0.88      23.0 +/-    0.88  0.050 / 0.070
G19     51.3           41.8              -62.9 +/-   28.71     -89.0 +/-   28.71  0.030 / 0.070
G24     256.5          38.9               14.0 +/-    1.10      20.7 +/-    1.10  0.060 / 0.100
G25     315.4          10.3              -17.1 +/-   19.47     -47.3 +/-   19.47  0.050 / 0.080