PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-07:57:40
G02     51.4           38.9                6.3 +/-    2.34       9.3 +/-    2.34  0.040 / 0.030
G05     82.0           67.9                6.1 +/-    0.41       6.5 +/-    0.41  0.030 / 0.030
G12     189.3          47.0                8.1 +/-    1.21      10.6 +/-    1.21  0.070 / 0.080
G20     205.2          41.3                7.2 +/-    1.25      10.3 +/-    1.25  0.060 / 0.080
G21     262.5          11.7                0.8 +/-   13.21       2.1 +/-   13.21  0.240 / 0.390
G25     260.3          57.6                5.3 +/-    1.74       6.1 +/-    1.74  0.240 / 0.450
G29     321.4          44.9                4.6 +/-    1.02       6.2 +/-    1.02  0.040 / 0.060