PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-08:42:50
G02     242.0          77.5                5.9 +/-    0.36       6.1 +/-    0.36  0.160 / 0.240
G05     171.9          15.8                4.3 +/-    1.08      10.4 +/-    1.08  0.130 / 0.270
G06     40.0           64.3                5.3 +/-    0.54       5.8 +/-    0.54  0.030 / 0.040
G12     321.2          49.8                5.5 +/-    0.41       6.9 +/-    0.41  0.030 / 0.040
G17     71.1           22.2                3.8 +/-    1.05       8.0 +/-    1.05  0.070 / 0.110
G19     57.8           38.0                4.0 +/-    0.96       6.0 +/-    0.96  0.070 / 0.120
G24     247.2          35.2                7.5 +/-    2.04      11.9 +/-    2.04  0.190 / 0.240
G25     316.7          11.9               -2.0 +/-   21.79      -5.3 +/-   21.79  0.300 / 0.250