PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/23-13:27:30
G02     243.4          76.8                6.0 +/-    0.63       6.1 +/-    0.63  0.070 / 0.140
G05     173.4          15.2                7.2 +/-    1.82      17.8 +/-    1.82  0.080 / 0.130
G06     40.2           60.4                3.9 +/-    0.78       4.4 +/-    0.78  0.030 / 0.050
G12     321.4          51.7                5.4 +/-    1.43       6.6 +/-    1.43  0.040 / 0.040
G17     73.0           20.0                5.4 +/-    1.14      11.9 +/-    1.14  0.090 / 0.240
G19     59.5           36.7                4.4 +/-    0.44       6.8 +/-    0.44  0.070 / 0.230
G24     246.3          34.6                7.7 +/-    1.04      12.2 +/-    1.04  0.090 / 0.120
G25     317.0          14.6                3.3 +/-    3.21       8.2 +/-    3.21  0.110 / 0.110