PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/07-10:27:30
G02     253.0          79.5                5.5 +/-    0.37       5.6 +/-    0.37  0.160 / 0.180
G05     171.3          18.0                5.8 +/-    2.88      13.4 +/-    2.88  0.120 / 0.140
G06     39.1           61.2                3.7 +/-    0.65       4.1 +/-    0.65  0.030 / 0.040
G12     321.1          53.0                4.5 +/-    0.66       5.5 +/-    0.66  0.030 / 0.040
G17     74.0           19.7                2.7 +/-    1.42       5.9 +/-    1.42  0.070 / 0.120
G19     61.0           35.9                3.8 +/-    1.03       6.0 +/-    1.03  0.080 / 0.120
G24     244.1          33.5                7.0 +/-    2.06      11.5 +/-    2.06  0.120 / 0.350
G25     317.2          15.0                3.6 +/-    2.63       8.9 +/-    2.63  0.130 / 0.360