PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/17-13:57:50
G02     44.9           45.1                6.0 +/-    0.48       8.1 +/-    0.48  0.020 / 0.020
G05     112.9          69.5                8.1 +/-    0.78       8.6 +/-    0.78  0.020 / 0.020
G06     59.9           10.4                7.2 +/-    1.78      19.8 +/-    1.78  0.070 / 0.100
G12     192.3          55.1               10.4 +/-    0.51      12.4 +/-    0.51  0.060 / 0.090
G20     201.3          37.5               11.5 +/-    1.33      17.5 +/-    1.33  0.040 / 0.040
G25     272.8          58.7               12.7 +/-    2.36      14.6 +/-    2.36  0.030 / 0.040
G29     318.9          42.4                6.7 +/-    0.71       9.3 +/-    0.71  0.040 / 0.030