PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/22-09:13:00
G02     233.3          74.7                4.2 +/-    0.68       4.3 +/-    0.68  0.220 / 0.280
G05     173.3          13.0                4.3 +/-    4.18      11.1 +/-    4.18  0.320 / 0.270
G06     41.5           68.1                3.1 +/-    0.46       3.3 +/-    0.46  0.050 / 0.090
G12     321.0          46.7                3.0 +/-    0.52       4.0 +/-    0.52  0.050 / 0.090
G17     68.7           23.8                3.3 +/-    1.21       6.6 +/-    1.21  0.040 / 0.050
G19     54.7           39.9                2.2 +/-    1.38       3.2 +/-    1.38  0.030 / 0.040
G24     250.7          36.8                3.8 +/-    1.26       5.8 +/-    1.26  0.030 / 0.020